Kill junk processes before build. Include serial integration tests
Kill junk processes before build. Include serial integration tests

Test Plan: n/a

Reviewers: jeschkies, aquamatthias

Subscribers: marathon-team

JIRA Issues: MARATHON-7036

Differential Revision: https://phabricator.mesosphere.com/D640

mesosphere/marathon,meln1k/marathon,gsantovena/marathon,natemurthy/marathon,mesosphere/marathon,natemurthy/marathon,guenter/marathon,mesosphere/marathon,gsantovena/marathon,mesosphere/marathon,gsantovena/marathon,mesosphere/marathon,gsantovena/marathon,guenter/marathon,meln1k/marathon,janisz/marathon,Caerostris/marathon,guenter/marathon,janisz/marathon,guenter/marathon,Caerostris/marathon,janisz/marathon,natemurthy/marathon,meln1k/marathon,meln1k/marathon,janisz/marathon,Caerostris/marathon,meln1k/marathon,guenter/marathon,Caerostris/marathon,Caerostris/marathon,janisz/marathon,gsantovena/marathon