Fix control validation in NewCredNavigation
Fix control validation in NewCredNavigation

The navigation controls (Next, Prev, Finish) only need to be validated
on certain pages.

Change-Id: I1ff18bc14fab760bd50b7620f45de61e11ebaad4

secure-endpoints/netidmgr,secure-endpoints/netidmgr,secure-endpoints/netidmgr,secure-endpoints/netidmgr,secure-endpoints/netidmgr