Update git submodules

Update git submodules

* Update docs/submodules/netconf from branch 'master'
  to cb1d2f74b370c16357af975a136e687fba3303e6
  - Use ControllerContext non-statically

    This is a preliminary patch for removing the web.xml and converting
    to the new programmtic web API which will allow us to remove the
    static instances that bridge between the web-instantiated
    and blueprint-instanriated components. First up is the
    ControllerContext - this patch keeps the static instance temporarily
    for the RestconfApplication but converts the rest of the code to
    inject the ControllerContext instance and reference it non-statically.

    This patch touches a lot of files but most are UTs.

    Change-Id: I08e2ee24e518c01bb1d5fdb5796abd9354dccfa2
    Signed-off-by: Tom Pantelis <tompantelis@gmail.com>