Open Stack

all,
i need to make some changes in my 3rd party CI system. specifically, 
i need to override devstack-gate-vm.sh for the mysql path - i can do this by setting SKIP_DEVSTACK_GATE_PROJECT in my examples.yaml file, although this means i will need to manually update the devstack-gate directory
however i also need to do this in the tempest directory.
(i need to overwrite the python-subunit and testtools versions in requirements.txt and test-requirments.txt files)


the problem is the scripts are set up to do a clean install for every run. 
git does a hard reset, checkout and clean (functions.sh)

am working on writing my own version of setup_project for some specific projects.

can this be better handled by allowing for specific projects to be merged instead of overwritten while setting up the workspace?

thanks!
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