e2e cloudSqlMySql source additional scenarios #1291

Job	Run time
build (mysql-plugin)	1h 19m 15s
build (mysql-plugin)	1h 19m 16s
build (postgresql-plugin)	32m 30s
build (postgresql-plugin)	32m 30s
build (oracle-plugin)	2h 12m 8s
build (oracle-plugin)	2h 12m 8s
build (mssql-plugin)	1h 19m 53s
build (mssql-plugin)	1h 19m 53s
build (cloudsql-mysql-plugin)	1h 15m 32s
build (cloudsql-mysql-plugin)	1h 15m 32s
build (cloudsql-postgresql-plugin)	6m 51s
build (cloudsql-postgresql-plugin)	6m 51s
	13h 32m 19s

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