Update initscripts, spec file for 0.17.0

This also fixes an issue with sourcing of /etc/rc.d/init.d/functions in
RHEL/CentOS/Fedora/etc., allowing the use of /etc/default/salt to
override environment variables.
pip not needed for EPEL5 package
Merge pull request #7529 from terminalmage/packaging

Update initscripts, spec file for 0.17.0