update the code to handle the scenario when both the parent and child directory exist in the litefile table
remove one line from xcat-prepivot.sh
updated the manpage for litefile
the statelite document is updated
/etc/mtab is added as one default entry when "litefile" or "ilitefile" commands are running, even it is not in litefile table
git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@8100 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd
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