debian: Fill in gecos field for jenkins user

Otherwise when Jenkins runs git, git will complain that the identity is
not set up correctly and will fail.
Keep consistence in pendings when exception is thrown during method pop()
[JENKINS-3107] Expand an Advanced section if some fields are already customized.
Initial implementation handles only text fields, not e.g. checkboxes.
[JENKINS-3107] Rather than preëxpanding the Advanced area, just show an icon.
[JENKINS-3107] IE 9 fix.
[JENKINS-3107] Icon looks better before button rather than after, for reasons of alignment with the rest of the form.
Add test if jobs do not stuck in pendings
expose --listen* command line arguments in RPM init script
Trying to demonstrate how to use some more advanced databinding. No luck so far.
Removing debug text.
Apparently cannot have a repeatableHeteroProperty not inside a section/block.
instance, not it.
Get choices from descriptor.
Immutability & copying of lists.
Better formatting.
User friendly response if deletion of a build fails
[JENKINS-18643] Make tests run on Windows. Use line.separator property instead of LF.
[JENKINS-18643] Make tests run on Windows. Use local HTTP server to access update-center.json for test.
Use Junit4/JenkinsRule
Improved search to search within ItemGroups by looking at all items
contained in Jenkins instead of only direct members.

SuggestedItem has been modified to display more information about the
hierarchy of items where results are stored.