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
VM Datastores: fix hover text

https://bugzilla.redhat.com/show_bug.cgi?id=1114706
Merge pull request #292 from mzazrivec/vm_datastores_fix_hover_text

Fix hover text for datastores in VM's overview
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"
Fix error display w/o session.

Fix display of errors w/o a valid session by:
  * wrapping @css[:background_color] into css_background_color,
  * adding rescue to role_allows.
Fix: session[:last_trans_time] was not set.

session[:last_trans_time] is not set in the login request but later.
We need to anticipate this in the PrivilegeCheckerService.
Add tests for referer checking on requests.
Refactor and cleanup validate_user in DashboardController.
Simplify set_user_time_zone.
Simplify ie8_safe_redirect calls.
RBAC: refactor and remove fallback.