1.2.10

• Use the same alias for Python in both 4.x and 5.x, python2.7.
  This only matters for tests.
  [smcmahon]
• The way we use become_user is problematic for Ansible 2.1 unless pipelining is in use.
  Set pipelining on in defaults.
  [smcmahon]
• Symbolic link to self for testing fouled up vagrant on platforms without client extensions.
  Change strategy to use ansible.cfg specification for roles.
  [smcmahon]