Update hibernate files to initialize timestamp

Updated the hibernate hbm.xml files to correct the following issues:
1) Timestamps had generated="insert" but hibernate was not auto-populating
	the timestamp value thus the DB was generating an exception.  Modified
	the definition of this field to cause hibernate to provide the default
	value of CURRENT_TIMESTAMP.  This impacted most of the hbm.xml files.
2) While running junit tests, the following message appeared in the log
	underneath most of the hbm.xml files:
		Recognized obsolete hibernate namespace
			http://hibernate.sourceforge.net/. Use namespace
			http://www.hibernate.org/dtd/ instead. Refer to
			Hibernate 3.6 Migration Guide!
	Updated most of the hbm.xml files, changing the namespace per the
	guide.  Note: a couple of the files were already correctly configured.

Change-Id: Id96775b7bd7a42da0c00e208e33aed6fa96ab996
Issue-Id: SO-215
Signed-off-by: Jim Hahn <jrh3@att.com>
diff --git a/mso-catalog-db/src/main/resources/HeatNestedTemplate.hbm.xml b/mso-catalog-db/src/main/resources/HeatNestedTemplate.hbm.xml
index b89a93c..a2c590f 100644
--- a/mso-catalog-db/src/main/resources/HeatNestedTemplate.hbm.xml
+++ b/mso-catalog-db/src/main/resources/HeatNestedTemplate.hbm.xml
@@ -19,7 +19,7 @@
   ============LICENSE_END=========================================================
   -->
 
-<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd" >
+<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd" >
 <hibernate-mapping package="org.openecomp.mso.db.catalog.beans">
 	<class name="HeatNestedTemplate" table="HEAT_NESTED_TEMPLATE">
 		<meta attribute="class-description">