Use fake client for connection pooler (zalando#1301)

Connection pooler creation, deletion, and synchronization now tested using fake client API.

Co-authored-by: Rafia Sabih <[email protected]>

Author: RafiaSabih

pkg/cluster/connection_pooler.go

@@ -713,7 +713,7 @@ func (c *Cluster) syncConnectionPooler(oldSpec, newSpec *acidv1.Postgresql, Look
 	// as per spec, hence do not skip syncing in that case, even though there
 	// is no diff in specs
 	if (!needSync && len(masterChanges) <= 0 && len(replicaChanges) <= 0) &&
-		(c.ConnectionPooler != nil && *newSpec.Spec.EnableConnectionPooler) {
+		(c.ConnectionPooler != nil && (needConnectionPooler(&newSpec.Spec))) {
 		c.logger.Debugln("syncing pooler is not required")
 		return nil, nil
 	}