don't search for a function name twice
Better error messages, using full function names supplied to getattr
Merge commit '95e8b7fb2539c783bafe0b1b7e538ab2fa724d76' from PR #826

Conflicts:
	ion/util/enhanced_resource_registry_client.py
make suspend_data_product_persistence idempotent with regard to data product deletion
Merge pull request #1216 from ifreecarve/2013-06-18_fix_buildbot_data_product_ms

Fixes to buildbot, caused when suspending persistence of deleted data product