Coin crash on nightly merge job due to nil gerritInstance

May 13 03:01:06 coin-master coin[11354]:         /var/lib/coin/tqtc-coin-ci/src/services/publisher/integratorparser.go:51 +0x171
May 13 03:01:06 coin-master coin[11354]: main.appMain({0x918238?, 0xc000020b40?})
May 13 03:01:06 coin-master coin[11354]:         /var/lib/coin/tqtc-coin-ci/src/services/publisher/publisher.go:88 +0x4eb
May 13 03:01:06 coin-master coin[11354]: ciapp.RunApp(0x8aa610)
May 13 03:01:06 coin-master coin[11354]:         /var/lib/coin/tqtc-coin-ci/src/ciapp/ciapp.go:126 +0x2c2
May 13 03:01:06 coin-master coin[11354]: main.main()
May 13 03:01:06 coin-master coin[11354]:         /var/lib/coin/tqtc-coin-ci/src/services/publisher/publisher.go:112 +0x25
May 13 03:01:06 coin-master coin[11354]: publisher:ciapp.go:61: Error: Panic: runtime error: invalid memory address or nil pointer dereference