Improved handling of tmp file creation in health check test.
Improved handling of tmp file creation in health check test.

The tmp file used in the HealthStatusChange test is now created inside
the tmp directory created for the test suite. This ensures that it will
be cleaned up on tear down.

Review: https://reviews.apache.org/r/52434/

neilconway/mesos,reneploetz/mesos,Gilbert88/mesos,verizonlabs/mesos,Gilbert88/mesos,jpeach/mesos,Aman-Jain-14/customizedMesos,reneploetz/mesos,chhsia0/mesos,jpeach/mesos,jpeach/mesos,neilconway/mesos,kaysoky/mesos,Gilbert88/mesos,Gilbert88/mesos,neilconway/mesos,chhsia0/mesos,kaysoky/mesos,reneploetz/mesos,craimbert/mesos,andschwa/mesos,gsantovena/mesos,yuquanshan/customizedMesos,gsantovena/mesos,gsantovena/mesos,jpeach/mesos,dforsyth/mesos,zmalik/mesos,jpeach/mesos,reneploetz/mesos,andschwa/mesos,dforsyth/mesos,gsantovena/mesos,verizonlabs/mesos,zmalik/mesos,jpeach/mesos,yuquanshan/customizedMesos,abudnik/mesos,Gilbert88/mesos,craimbert/mesos,kaysoky/mesos,kaysoky/mesos,chhsia0/mesos,craimbert/mesos,asamerh4/mesos,abudnik/mesos,zmalik/mesos,reneploetz/mesos,verizonlabs/mesos,zmalik/mesos,kaysoky/mesos,reneploetz/mesos,chhsia0/mesos,gsantovena/mesos,Aman-Jain-14/customizedMesos,zmalik/mesos,jpeach/mesos,andschwa/mesos,abudnik/mesos,asamerh4/mesos,kaysoky/mesos,gsantovena/mesos,abudnik/mesos,dforsyth/mesos,abudnik/mesos,verizonlabs/mesos,dforsyth/mesos,neilconway/mesos,yuquanshan/customizedMesos,kaysoky/mesos,chhsia0/mesos,yuquanshan/customizedMesos,andschwa/mesos,reneploetz/mesos,Aman-Jain-14/customizedMesos,dforsyth/mesos,Aman-Jain-14/customizedMesos,verizonlabs/mesos,craimbert/mesos,asamerh4/mesos,abudnik/mesos,Gilbert88/mesos,dforsyth/mesos,neilconway/mesos,chhsia0/mesos,Aman-Jain-14/customizedMesos,zmalik/mesos,chhsia0/mesos,Aman-Jain-14/customizedMesos,yuquanshan/customizedMesos,gsantovena/mesos,yuquanshan/customizedMesos,andschwa/mesos,asamerh4/mesos,neilconway/mesos,andschwa/mesos,andschwa/mesos,verizonlabs/mesos,craimbert/mesos,Gilbert88/mesos,verizonlabs/mesos,asamerh4/mesos,abudnik/mesos,craimbert/mesos,asamerh4/mesos,neilconway/mesos,Aman-Jain-14/customizedMesos,dforsyth/mesos,craimbert/mesos,asamerh4/mesos,zmalik/mesos,yuquanshan/customizedMesos