Replace use of "install" with "installation" update test files

Author: thrijith

features/site-empty.feature

@@ -1,7 +1,7 @@
 Feature: Empty a WordPress site of its data
 
   Scenario: Empty a site
-    Given a WP install
+    Given a WP installation
     And I run `wp option update uploads_use_yearmonth_folders 0`
     And download:
       | path                        | url                                              |
@@ -43,7 +43,7 @@ Feature: Empty a WordPress site of its data
     Then STDOUT should be empty
 
   Scenario: Empty a site and its uploads directory
-    Given a WP multisite install
+    Given a WP multisite installation
     And I run `wp site create --slug=foo`
     And I run `wp --url=example.com/foo option update uploads_use_yearmonth_folders 0`
     And download:

features/site-option.feature

@@ -1,7 +1,7 @@
 Feature: Manage WordPress site options
 
   Scenario: Site Option CRUD
-    Given a WP multisite install
+    Given a WP multisite installation
 
     # String values
     When I run `wp site option add str_opt 'bar'`
@@ -111,7 +111,7 @@ Feature: Manage WordPress site options
       """
 
   Scenario: Error on single install
-    Given a WP install
+    Given a WP installation
 
     When I try `wp site option get str_opt`
     Then STDERR should be:
@@ -128,7 +128,7 @@ Feature: Manage WordPress site options
     And the return code should be 1
 
   Scenario: Filter options by `--site_id`
-    Given a WP multisite install
+    Given a WP multisite installation
 
     When I run `wp db query "INSERT INTO wp_sitemeta (site_id,meta_key,meta_value) VALUES (2,'wp_cli_test_option','foobar');"`
     Then the return code should be 0