Updates Issue 766
Fixed a harmless but unsightly NullPointerException in SqlDataSource that appeared during first online operation. 

git-svn-id: http://tungsten-replicator.googlecode.com/svn/trunk@2505 9f5e3340-5c9a-25cb-7c1c-c133a2e9e928
Updates Issue 766
Adjusted runtime API to make fetching a data source a one-line call with simple semantics.  Fixed THL class to disable updating position in catalog when data source type is unspecified, which also includes case when we are using DummyDataSource. 

git-svn-id: http://tungsten-replicator.googlecode.com/svn/trunk@2507 9f5e3340-5c9a-25cb-7c1c-c133a2e9e928
Change level of log message from info to debug

git-svn-id: http://tungsten-replicator.googlecode.com/svn/trunk@2508 9f5e3340-5c9a-25cb-7c1c-c133a2e9e928