Cleanup failed services (#911)

* chore: Fixes broker 'failed to allocate' test errors

We can only have 5 instances of our test broker running. Tests that use the test broker can see 'failed to allocate' errors. This is because in the case of a failed creation of a service in our tests will fail to clean up the test broker, causing other test runs to fail.

* chore: corrected typo in commit 3ebc0f1

Cleanup referred to wrong service name.

acceptance-tests/mssql_fog_existing_test.go

@@ -83,7 +83,7 @@ var _ = Describe("MSSQL Failover Group Existing", Label("mssql-db-failover-group
 		By("connecting to the existing failover group")
 		servicePlanExisting := "existing"
 		serviceNameExisting := random.Name(random.WithPrefix(serviceOffering, servicePlanExisting))
-		defer services.Delete(serviceName)
+		defer services.Delete(serviceNameExisting)
 		dbFogInstance := services.CreateInstance(
 			serviceOffering,
 			servicePlanExisting,