webadmin: Fix 'Add Bricks' issue in new volume popup

 Removing the unnecessary parser for volume type in
AddBrickPopupView.

Change-Id: I10102b633f6f027bbce8d3a9c276023f2012c48b
Bug-Url: https://bugzilla.redhat.com/1114979
Signed-off-by: Ramesh Nachimuthu <rnachimu@redhat.com>