Update jenkins to latest LTS (1.642.4)
Update jenkins to latest LTS (1.642.4)

Change-Id: I906c77b76bb834f8af7e31f5bb84b6460290b6d0

bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration