PMM-2569: Support for MySQL 8.

Author: arvenil

.travis.yml

@@ -20,10 +20,7 @@ env:
     - MYSQL_IMAGE=mysql:5.5
     - MYSQL_IMAGE=mysql:5.6
     - MYSQL_IMAGE=mysql:5.7
-    # github.com/go-sql-driver/mysql doesn't support new default auth plugin in MySQL 8.0.
-    # https://github.com/go-sql-driver/mysql/issues/785
-    # https://github.com/go-sql-driver/mysql/pull/552
-    - MYSQL_IMAGE=mysql:8.0 MYSQL_COMMAND=--default-authentication-plugin=mysql_native_password
+    - MYSQL_IMAGE=mysql:8.0
     - MYSQL_IMAGE=percona/percona-server:5.6
     - MYSQL_IMAGE=percona/percona-server:5.7
     # percona:5.5 doesn't pass one test, not really sure why as other 5.5 images work.

docker-compose.yml

@@ -11,7 +11,6 @@ services:
       # https://mariadb.com/kb/en/mariadb/performance-schema-overview/#activating-the-performance-schema
       - --performance-schema
       - --secure-file-priv=
-      - ${MYSQL_COMMAND:---verbose}
     volumes:
       - ./test/schema/:/docker-entrypoint-initdb.d/:rw
   mongo:

glide.lock

@@ -20,7 +20,6 @@ import:
   - src/go/mongolib/stats
 - package: github.com/percona/pmgo
 - package: github.com/percona/pmm
-  version: 88b7a3ea548f89aa63c3ec946c5a20db949db715
   subpackages:
   - proto
   - proto/config