e2e additional CloudSQLPostgreSQL source scenarios #1315

Job	Run time
build (mysql-plugin)	1h 19m 15s
build (mysql-plugin)	1h 19m 15s
build (postgresql-plugin)	32m 28s
build (postgresql-plugin)	32m 28s
build (oracle-plugin)	2h 12m 13s
build (oracle-plugin)	2h 12m 21s
build (mssql-plugin)	1h 19m 26s
build (mssql-plugin)	1h 19m 26s
build (cloudsql-mysql-plugin)	1h 28m 57s
build (cloudsql-mysql-plugin)	1h 28m 57s
build (cloudsql-postgresql-plugin)	57m 27s
build (cloudsql-postgresql-plugin)	57m 27s
	15h 39m 40s

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