fix issue 241844 The added os packages are not installed when reinstall nodes.
fix defect #4263 Some packages in pkglist file are not exist in RHEL7
fix a typo
Merge branch '2.8' of ssh://git.code.sf.net/p/xcat/xcat-core into 2.8
fix for bug 4265: remove getxcatdocs from PCM build