sktm doesn't handle locked databases

[spbnick]

Sktm aborts if it detects SQLite database is locked by another process:

Traceback (most recent call last):
File "/home/skt/sktm/sktm.py", line 129, in
sw.wait_for_pending()
File "/home/skt/sktm/sktm/init.py", line 297, in wait_for_pending
self.check_pending()
File "/home/skt/sktm/sktm/init.py", line 287, in check_pending
patches, bres, bid, series)
File "/home/skt/sktm/sktm/db.py", line 391, in commit_patchtest
brepoid = self.get_repoid(baserepo)
File "/home/skt/sktm/sktm/db.py", line 114, in get_repoid
(baserepo,))
sqlite3.OperationalError: database is locked

This needs investigation, and, if possible, sktm should persist and retry until the database is unlocked.