Closes-Bug: #1334357, #1350475, #1350974, #1349981
    1. changed rest-api port from default to 5005
    2. enabled rest-api services
    3. rbd cache enable and size set is done after pg set
    4. Fixed replica size for Volumes_hdd and Volumes_ssd pools
    5. Fix for add_storage_node w.r.t firefly changes

Change-Id: I9e49ae5901a360d8c15ea92a3d3ef0fed966e244