Add default branch to .gitreview for icehouse branch

This will cause git review to do the right thing when people try to
submit patches to this branch.

Change-Id: I2442ee48cf5aa60edc4a3f977d8d8c01988cec46
Checkout stable/icehouse of OpenStack

From the stable/icehouse branch of tripleo-incubator we need to set
DIB_REPOREF_* variables for all of the OpenStack projects to
stable/icehouse.

Change-Id: I59cac05615780c702234730c64e4127876602947
Switch back to oslo sphinx
Use packaged template directory path
Move setup-clienttools to devtest_setup.sh