Adding intellij project files to .gitignore

Patch Set 2:
Re-ordered new files to keep .gitignore sorted

Change-Id: I337ff8ea0e950ae94effb226a5170570b489d68a
Signed-off-by: Mooli Tayer <mtayer@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/16417
Tested-by: Assaf Muller <amuller@redhat.com>
Reviewed-by: Dan Kenigsberg <danken@redhat.com>