Combine changes for BZ955602 and BZ655643 (dns-nsupdate config and exceptions)

* Raise proper exeception: DNSException
* Check access and presence of KRB5 keytab file
* Do not initialize TSIG variables if GSS-TSIG is provided

Replace PR2199, 2198 and 2260
Bug 961227
<oo-accept-broker> Bug 959164 - Fix mongo test with replica sets

https://bugzilla.redhat.com/show_bug.cgi?id=959164

Fix mongo db tests in oo-accept-broker when using a mongo replica set.

Added a Require for mongodb (the client package) for
openshift-origin-broker-util, otherwise oo-accept-broker fails when the
mongodb host is not the same as the broker.
Merge pull request #2438 from danmcp/master

Merged by openshift-bot
Merge pull request #2269 from markllama/bugs/BZ955602

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Bug 962354
Make process label checks in cuke tests v1/v2 compatible
Card online_runtime_297 - Allow cartridges to use more resources

* Increase httpd ServerLimit from 5 to 60
Add unit test coverage for v2_cart_model#unlock_gear
Merge pull request #2437 from detiber/bz959164

Merged by openshift-bot
Merge pull request #2445 from danmcp/master

Merged by openshift-bot
Merge pull request #2446 from ironcladlou/dev/v2carts/cuke/crosscompatibility

Merged by openshift-bot
Merge pull request #2448 from jwhonce/card/297

Merged by openshift-bot
Merge pull request #2449 from pmorie/dev/unlock_gear

Merged by openshift-bot