Sometimes gsutil cp -r can miss files.  We also don't need to copy over
every file.  Additionally, I started to abstract the OS_ARCH away so
that we can more easily template the jenkins OS tests.

Set logging to verbose, cleanup config before runs.

Added appropriate executable permissions (755) in github shell scripts so jenkins can run them w/o modifying

Adding Jenkins files to /hack/jenkins  After this commit goes throught, changes to jenkins should be made to use the scripts in this /hack/jenkins folder directly