Update git submodules

Update git submodules

* Update docs/submodules/portal.git from branch 'master'
  to 147d575c4899aa1abf32fbb7fd8d89ad181167a2
  - Merge "Added portal-FE-os project"
  - Added portal-FE-os project

    Added portal-FE-os project and included layout components which is
    having header,footer,global-serach,header-menu,search-users,sidebar,tabbar,userbar components.
    Removed layout components from portal-FE-common

    Issue-ID: PORTAL-795
    Change-Id: I5764a851ef3b1ba701117759dac38909f129aabd
    Signed-off-by: Sudarshan Kumar <sudarshan.kumar@att.com>