Inspired from the tox_install script in the python-openstackclient, this
commit brings in the following improvements to python-glanceclient's
tools/tox_install.sh:
* Do not leave temporary directory around, instead delete temporary
directory directly after usage (change
I939eae82dba3287fd4e4086128ebf4609a0e0770).
* Do not set ZUUL_BRANCH explicitely and remove unused if condition
(change I0077c986a17d6bb92791474e03d1e77776e9382f).
Change-Id: Ibed7e2fbe35d2f2a520383e36ad31a5e7c8ef548
This will force pip install to use the upper-constraints.txt specified
version of pip modules. When you don't do this, you are out on the
bleeding edge and become unstable everytime some python library in the
world changes in a way that you don't expect.
The script is needed because it cleans up the conflicting entry that
corresponds to the client before applying it to source based installation.
Change-Id: I8f168fde04bf9e421d9a39e91a041512bf4f2b79
Closes-Bug: 1563038
Andreas Jaeger