[GSS] (6.1.z) SSH timeout value hard-coded for git server

+++ This bug was initially created as a clone of Bug #1278227 +++

Description of problem:
We are receiving the following error when a user is attempting to authenticate to Git over SSH and the amount of time exceeds the timeout value.

~~~
User session has timed out idling after 10000 ms
~~~

Version-Release number of selected component (if applicable):
uberfire 0.5.3.Final

How reproducible:

Steps to Reproduce:
1.
2.
3.

Actual results:
We cant change increase the SSH session timeout

Expected results:
We should be able to change the SSH session timeout value through options.

Additional info:
Timeout value is hard-coded in GitSSHService.java

— Additional comment from JBoss Product and Program Management on 2015-11-04 20:20:09 EST —

Since this issue was entered in Red Hat Bugzilla, the release flag has been
set to ? to ensure that it is properly evaluated for this release.