Do not brush over VOL_BASE_DIR with a new temp dir, since jenkins-common.sh has
already figured out where these should run.
Should fix jenkins job build failures for mgw and ggsn, after the merge of
I8cf6014725ae8ba602be5f3ec31dfb8e49ff993e.
Change-Id: Iee034df93bf8e8b995262749cf4654886032af2b
To remove code dup and prepare a change to where logs are written, add
collect_logs() to jenkins_common.sh and call that from each jenkins.sh after
the tests are done.
The 'rm -rf' is already done before a test starts. No need to do that again
after each test.
Change-Id: I5d8472ec36b07c828685b1bd7718e31392d168a3