add conversion utility

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

+#!/usr/bin/env python
+
+class ValueUtility:
+
+    @classmethod
+    def toBoolean(cls, value):
+        if value is None:
+            return False
+        if str(value).lower() == 'true':
+            return True
+        return False
+
+#######################################################################
+# Testing.
+if __name__ == '__main__':
+    print ValueUtility.toBoolean('True')