revert change which should not be part of this PR

Author: ThoSap

operator/src/main/java/it/aboutbits/postgresql/crd/clusterconnection/ClusterConnectionSpec.java

@@ -18,7 +18,7 @@
 public class ClusterConnectionSpec {
     @Required
     @ValidationRule(
-            value = "self.trim().size() > 0",
+            value = "self.size() > 0",
             message = "The ClusterConnection host must not be empty."
     )
     private String host = "";
@@ -30,7 +30,7 @@ public class ClusterConnectionSpec {
 
     @Required
     @ValidationRule(
-            value = "self.trim().size() > 0",
+            value = "self.size() > 0",
             message = "The ClusterConnection database must not be empty."
     )
     private String database = "postgres";