symmetric version of graph partitioner in solver

4 jobs for master in 8 minutes and 12 seconds (queued for 2 minutes and 16 seconds)
Status Name Job ID Coverage
  Build
passed build_debug #1075

00:02:42

passed build_opt #1076

00:04:00

 
  Test
passed test_debug #1077

00:01:00

passed test_opt #1078

00:00:29