PHPC-2073: Remove references to pre-3.6 servers (#1305)

* Remove pre-3.6 server versions from Evergreen matrix

* Remove skipped tests for pre-3.6 servers

* Remove old mongo-orchestration configs and Evergreen tasks

* Remove flaky replica set tests

These tests assume a particular replica set member is always the primary, so tag assertions may fail if a different member is elected. The server-getTags-002.phpt test has more flexible assertions for replica set tags, so we can safely remove these tests.

Author: jmikola

.evergreen/config.yml

@@ -86,6 +86,7 @@ functions:
            fi
 
            export MONGO_ORCHESTRATION_HOME="$DRIVERS_TOOLS/.evergreen/orchestration"
+           # Note: PHPC no longer has any custom MO configs, but they can be stored here if needed
            export PROJECT_ORCHESTRATION_HOME="$PROJECT_DIRECTORY/.evergreen/orchestration"
            export MONGODB_BINARIES="$DRIVERS_TOOLS/mongodb/bin"
            export UPLOAD_BUCKET="${project}"
@@ -547,16 +548,6 @@ tasks:
           vars:
             SSL: "yes"
 
-    - name: "test-standalone-old"
-      tags: ["standalone"]
-      commands:
-        - func: "compile driver"
-        - func: "bootstrap mongo-orchestration"
-          vars:
-            TOPOLOGY: "server"
-            ORCHESTRATION_FILE: "standalone-old.json"
-        - func: "run tests"
-
     - name: "test-replicaset"
       tags: ["replicaset"]
       commands:
@@ -576,16 +567,6 @@ tasks:
             AUTH: "auth"
         - func: "run tests"
 
-    - name: "test-replicaset-old"
-      tags: ["replicaset"]
-      commands:
-        - func: "compile driver"
-        - func: "bootstrap mongo-orchestration"
-          vars:
-            TOPOLOGY: "replica_set"
-            ORCHESTRATION_FILE: "replicaset-old.json"
-        - func: "run tests"
-
     - name: "test-sharded"
       tags: ["sharded"]
       commands:
@@ -1054,18 +1035,6 @@ axes:
         display_name: "MongoDB 3.6"
         variables:
            VERSION: "3.6"
-      - id: "3.4"
-        display_name: "MongoDB 3.4"
-        variables:
-           VERSION: "3.4"
-      - id: "3.2"
-        display_name: "MongoDB 3.2"
-        variables:
-           VERSION: "3.2"
-      - id: "3.0"
-        display_name: "MongoDB 3.0"
-        variables:
-           VERSION: "3.0"
 
   - id: edge-versions
     display_name: MongoDB Version
@@ -1075,9 +1044,9 @@ axes:
         variables:
           VERSION: "4.4"
       - id: "oldest-supported"
-        display_name: "MongoDB 3.0"
+        display_name: "MongoDB 3.6"
         variables:
-          VERSION: "3.0"
+          VERSION: "3.6"
 
   - id: php-versions
     display_name: PHP Version
@@ -1189,18 +1158,6 @@ buildvariants:
     - name: "test-standalone-ssl"
     - name: "test-replicaset-auth"
 
-# Tests pre-3.6 MongoDB versions with oldest supported PHP version
-- matrix_name: "test-old-mongodb-versions"
-  matrix_spec: { "os": "*", "versions": ["3.0", "3.2", "3.4"], "php-edge-versions": "oldest-supported" }
-  exclude_spec:
-    - { "os": "ubuntu1804-arm64", "versions": "*", "php-edge-versions": "oldest-supported" }
-    - { "os": "rhel71-power8", "versions": "3.0", "php-edge-versions": "oldest-supported" }
-    - { "os": "rhel74-zseries", "versions": ["3.0", "3.2"], "php-edge-versions": "oldest-supported" }
-  display_name: "${os}, ${versions}, ${php-edge-versions}"
-  tasks:
-    - name: "test-standalone-old"
-    - name: "test-replicaset-old"
-
 # Tests MongoDB 3.6 with oldest supported PHP version
 - matrix_name: "test-mongodb-36"
   matrix_spec: { "os": "*", "versions": ["3.6"], "php-edge-versions": "oldest-supported" }

.evergreen/orchestration/configs/replica_sets/basic-ssl.json

@@ -3,7 +3,6 @@ MongoDB\Driver\Monitoring\CommandFailedEvent::getReply()
 --SKIPIF--
 <?php require __DIR__ . "/../utils/basic-skipif.inc"; ?>
 <?php skip_if_not_live(); ?>
-<?php skip_if_server_version('<', '3.4'); ?>
 --FILE--
 <?php
 require_once __DIR__ . "/../utils/basic.inc";

.evergreen/orchestration/configs/replica_sets/basic.json

@@ -4,7 +4,6 @@ MongoDB\Driver\Monitoring\CommandStartedEvent during mongoc_client_destroy()
 <?php require __DIR__ . "/../utils/basic-skipif.inc"; ?>
 <?php skip_if_not_libmongoc_crypto(); ?>
 <?php skip_if_not_live(); ?>
-<?php skip_if_server_version('<', '3.6'); ?>
 --FILE--
 <?php
 require_once __DIR__ . "/../utils/basic.inc";

.evergreen/orchestration/configs/replica_sets/replicaset-old.json

@@ -3,7 +3,6 @@ MongoDB\Driver\BulkWrite debug output after execution
 --SKIPIF--
 <?php require __DIR__ . "/../utils/basic-skipif.inc"; ?>
 <?php skip_if_not_live(); ?>
-<?php skip_if_server_version('<', '3.6'); ?>
 <?php skip_if_not_clean(); ?>
 --FILE--
 <?php

.evergreen/orchestration/configs/servers/standalone-old.json

@@ -4,7 +4,6 @@ MongoDB\Driver\BulkWrite::delete() hint option requires MongoDB 4.4 (server-side
 <?php require __DIR__ . "/../utils/basic-skipif.inc"; ?>
 <?php skip_if_not_live(); ?>
 <?php skip_if_server_version('>=', '4.3.4'); ?>
-<?php skip_if_server_version('<=', '3.6.0'); ?>
 --FILE--
 <?php
 require_once __DIR__ . "/../utils/basic.inc";