Add support for description on region object
<mongodb cart> adapt to use SCL-provided mongodb

Bug 1073126
https://bugzilla.redhat.com/show_bug.cgi?id=1073126

Adds `lib/mongodb_context`, which wraps MongoDB executables with
appropriate SCL context

Adds `update_configuration` function: sets up `PATH`, `MANPATH`, and
`LD_LIBRARY_PATH` for shell env

Update `mongo` shell function in `rhcsh`: don't clear `LD_LIBRARY_PATH`
before calling `mongo`, trust the `PATH` variable to find the right
`mongo`, and resolve mongo path into var `mongo_bin`
mongodb cart: address bugs with scaled carts

Bug 1073126
https://bugzilla.redhat.com/show_bug.cgi?id=1073126#c8

Add `publish-ld-library-path-info` hook, lock `mongodb/lib` directory

Also addresses issue with `rhcsh` where correct `mongo` bin isn't
necessarily on the `PATH`
mongodb cart: Support non-SCL systems

Bug 1104072
https://bugzilla.redhat.com/show_bug.cgi?id=1104072

This commit updates the cart spec file to conditionally call the
`mkjournal` script with or without SCL mongo, updates `mongodb_context`
to support non-scl mongo and tweaks `rhcsh` in a similar manner.

Additional fixes include:

* modify the `mongo` function in `rhcsh` to properly quote
  user-specified parameters for passing to `scl enable mongodb24`

* conditionally publish path elements so the correct `mongo*` binaries
  are preferred in scaled and non-scaled environments

* defensively quote user-specified parameters in function `mongo` in
  `rhcsh` so that things like exotic passwords that contain spaces are
  passed to the `mongo` binary without being erroneously split into
  multiple arguments
mongodb cart: clean up `mongodb_context`, `rhcsh`

Integrating Miciah's suggestions to simplify `update_configuration` and
`rhcsh` `mongo` function - smarter path element generation and more
correct handling for empty `ld_path` variables

Squashed commit:

add Vojtech's much smarter path element extraction
Bug 1121217 - Symbol leak in Throttler cgroup code

* Enhance debugging output
* Remove to_sym in keys
Bug 1121217 - Symbol leak in Throttler cgroup code

* fix tests
Delete users plan_id users after admin-console functional tests

- Change from MiniTest::Unit.after_tests to teardown since the
  after_tests weren't being triggered properly, and users were getting
  created after every test run.  The 'unless @domain' doesn't skip the
  user creation on subsequent tests, so after the
  admin-console/test/functional/admin_console/api/search/users_contorller_test.rb
  script is run there are 7 users in the openshift_broker_test db with
  plan_id: "free".
Merge pull request #5695 from jwhonce/bug/1121217

Merged by openshift-bot
Merge pull request #5441 from dobbymoodge/sclmongo

Merged by openshift-bot
Merge pull request #5689 from derekwaynecarr/region_description

Merged by openshift-bot
bump_minor_versions for sprint 49
Automatic commit of package [openshift-origin-cartridge-jenkins-client] release [1.25.1-1].
Automatic commit of package [rubygem-openshift-origin-node] release [1.29.1-1].
Automatic commit of package [openshift-origin-cartridge-haproxy] release [1.27.1-1].
Automatic commit of package [openshift-origin-cartridge-jbosseap] release [2.20.1-1].
Automatic commit of package [openshift-origin-cartridge-jbossews] release [1.27.1-1].
Automatic commit of package [openshift-origin-cartridge-postgresql] release [1.28.1-1].
Automatic commit of package [rubygem-openshift-origin-admin-console] release [1.24.1-1].
Automatic commit of package [openshift-origin-cartridge-jenkins] release [1.25.1-1].