
This improves on commit 4350c17604
We found a major performance regression in keystoneclient
when using PKI tokens, related to http://bugs.python.org/issue25870
It can be tested with
time python -c "import textwrap; textwrap.wrap('x'*9000, 64)"
which has a complexity of O(n*n)
because it uses certain regexps in python versions before 3.5.
Closes-Bug: #1526686
Related-Bug: #1404402
Change-Id: Ibc81907c4d9db2c09fff41ccf21345fbdb19202d