Storage : Fixed "Add a new Storage Manager" issue

issue #243
Update VCR to see errors disguised by "UnusedHTTPInteractionError"

VCR fixed by: https://github.com/vcr/vcr/pull/336
discussion: http://talk.manageiq.org/t/travis-vcr-cassettes-and-unused-http-interactions/97/2
configure pg_hba.conf for 95% use case
move postgres certificates to common certs directory

- fix spacing
public ca comment
Add specs for automation engine's data type handling.
Fix automation engine to handle the data value based on its data type.
Merge pull request #270 from AparnaKarve/add_storage_manager_issue

Storage : Fixed "Add a new Storage Manager" issue
Merge pull request #275 from kbrock/database_privileges

Database privileges
Merge pull request #265 from lfu/ae_engine_datatype

Fix automation engine to honor the data type.
Merge pull request #291 from brandondunne/upgrade_vcr

Update VCR to see errors disguised by "UnusedHTTPInteractionError"