Fixed appc provisioner tests to use absolute work directory.
Fixed appc provisioner tests to use absolute work directory.

Review: https://reviews.apache.org/r/51503/

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