Try bumping the test time limit to 45 seconds

Again, this is to accomodate the "dispatchmp" test on slower
machines (it takes 14-15 seconds on a modern machine).
2 jobs for java9 in 3 minutes and 42 seconds (queued for 4 seconds)
Status Job ID Name Coverage
  Build
passed #20249
build

00:00:48

 
  Test
passed #20250
test

00:02:53