move utility for creating new objects from string into its own utility

src/python/dm/common/utility/objectUtility.py

+#!/usr/bin/env python
+
+from dm.common.utility.loggingManager import LoggingManager
+
+class ObjectUtility:
+
+    @classmethod
+    def createObjectInstance(cls, moduleName, className, constructor):
+        logger = LoggingManager.getInstance().getLogger(cls.__name__)
+        logger.debug('Creating object: %s, %s, %s' % (moduleName, className, constructor))
+        cmd = 'from %s import %s' % (moduleName, className)
+        exec cmd
+        cmd = 'objectInstance = %s' % (constructor)
+        exec cmd
+        return objectInstance
+