e2e tests Oracle source #1178

Job	Run time
build (mysql-plugin)	1h 15m 51s
build (postgresql-plugin)	32m 50s
build (oracle-plugin)	2h 25m 27s
build (mssql-plugin)	1h 19m 49s
build (cloudsql-mysql-plugin)	1h 16m 45s
build (cloudsql-postgresql-plugin)	6m 35s
	6h 57m 17s

Provide feedback