core, webadmin : Fix issues with reports integration

Reports tab and right click reports generation
need to use different url to access reports.
Reports tab is not updated when clicking on
system tree. Sometimes null uri is sent to
reports.

Change-Id: Id5e91aa80dcd4e4d4f175d0193e92d19e65281e6
Bug-Url: https://bugzilla.redhat.com/1116851
Signed-off-by: Ravi Nori <rnori@redhat.com>
core : Welcome page should use base reports URL

Welcome page should redirect user to base
reports url from reports portal link

Change-Id: I732df3a7d6ebec5915be21bb945889d8660c615c
Bug-Url: https://bugzilla.redhat.com/1116851
Signed-off-by: Ravi Nori <rnori@redhat.com>