-Prevent Cisco switches from being scanned by community string indexes without a valid index
-Prevent scanning ports on a cisco for which there is no entry in cisco membership mib and it would be required
git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@2498 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd