fix unchecked warnings

Author: ThoSap

operator/src/test/java/it/aboutbits/postgresql/crd/clusterconnection/ClusterConnectionReconcilerErrorTest.java

@@ -52,8 +52,9 @@ void setUp() {
         resource.setSpec(spec);
         resource.setMetadata(metadata);
 
-        //noinspection unchecked
-        context = mock(Context.class);
+        @SuppressWarnings("unchecked")
+        Context<ClusterConnection> mockedContext = mock(Context.class);
+        context = mockedContext;
     }
 
     @Test