Adding a check if the respective pkg.upgrade cmd fails.
Fixing lint issue in pkgpng.  Reverting changes in brew.py because of unit tests failures.
block_device_mappings support for CloudStack

block_device_mappings can be used with CloudStack the same way
as Amazon. It will remove any disks attached to a machine when
destroying it.
Update dockerio.py
Update dockerio.py
Update dockerio.py
support IPIP interface type for RedHat linux.
Add no_use_wheel option to pip.install
Update dockerio.py
Update dockerio.py
Update dockerio.py
Update dockerio.py
Update dockerio.py
Update dockerio.py
Fix linting error
Add no_use_wheel option to pip.installed
Fix error message command argument
Fix linting error
Add file_tree external pillar (should fix #13510).
Fixing #14778 - When mount is True we need to ensure the directory exists