Fix topology page issue with deps and images

Topology page now shows dependencies between apps or networks
Add app images to topology page
Show real app images instead of dummy app icon.

Change-Id: Ia8c1588239a4d6ea185866f0dd536f2c18178761
Closes-Bug: #1336587
Closes-Bug: #1336587
Merge "Fix topology page issue with deps and images"