Remove F2 instance classes as F1s work great (GoogleCloudPlatform#663)

* fixes getting-started tests

* removes F2 instance classes

Author: bshaffer

appengine/php72/getting-started/app.yaml

@@ -2,7 +2,6 @@
 # complete list of `app.yaml` directives.
 
 runtime: php72
-instance_class: F2
 
 env_variables:
     GOOGLE_STORAGE_BUCKET: ""

appengine/php72/getting-started/test/DeployTest.php

@@ -46,6 +46,7 @@ private static function beforeDeploy()
 
         $appYaml = Yaml::parse(file_get_contents($tmpDir . '/app.yaml'));
         $appYaml['env_variables']['GOOGLE_STORAGE_BUCKET'] = $bucketName;
+        $appYaml['env_variables']['CLOUDSQL_CONNECTION_NAME'] = $connection;
         $appYaml['env_variables']['CLOUDSQL_USER'] = $dbUser;
         $appYaml['env_variables']['CLOUDSQL_PASSWORD'] = $dbPass;
         $appYaml['env_variables']['CLOUDSQL_DATABASE_NAME'] = $dbName;

appengine/php72/grpc/app.yaml

@@ -1,5 +1,4 @@
 runtime: php72
-instance_class: F2
 
 handlers:
 - url: /