Redirect streams to /dev/null unless verbose enabled

Redirect stdout and stderr to /dev/null unless the verbose option
is specified. This is a usability enhancement for the majority
use case which is a daemon-like mode for logshifter in which no
output should ever be expected from the program. If the streams
are left open and undirected, readers may block waiting for
output from logshifter itself.

Resolves bug https://bugzilla.redhat.com/show_bug.cgi?id=1085068
separate scaling and storage tracking events
Moved pruning of non-districted/non-zone nodes(when districted/zone nodes are available) from rpc_find_all_available to select_best_fit_node.
Rationale: Node selection plugin should have flexibility to choose any candidate node from non-districted/districted/non-zone/zone nodes.
Bug 1071272 - oo-admin-repair: Only allow node removal from its district when no apps are referencing that node

Fix application functional test
Bug 1071393 - Fix DNSLoginException
Merge pull request #5181 from ironcladlou/logshifter-stdout-close

Merged by openshift-bot
Merge pull request #5163 from pravisankar/dev/ravi/bug1071393

Merged by openshift-bot
Merge pull request #5184 from danmcp/master

Merged by openshift-bot
Merge pull request #5185 from pravisankar/dev/ravi/fix-node-selection

Merged by openshift-bot
Fixing error message around submodule repo
Merge pull request #5186 from danmcp/master

Merged by openshift-bot