Improve reliability of OSTF init hook

OSTF initialization hook will retry every
5 seconds for 250 seconds to try to set
up its database instead of trying once
and silently failing.

Change-Id: I1f8c25e20c19fcbb8356bb4db94083ce13aa2dcf
Closes-Bug: #1314634
Merge "Improve reliability of OSTF init hook"