Update git submodules

Update git submodules

* Update docs/submodules/optf/cmso.git from branch 'master'
  to 520fdcf304cc2ea282859017b4a3ccf26ee5ae70
  - Merge this if statement with the enclosing one

    Merging collapsible if statements increases the code's readability.

    Issue-ID: OPTFRA-634
    Change-Id: Ic1c24c2671f62282477e32c432216ac560745c03
    Signed-off-by: anushadasari <danush10@in.ibm.com>
  - Remove the declaration of thrown exception

    Remove the declaration of thrown exception 'com.fasterxml.jackson.databind.JsonMappingException' which is a subclass of 'java.io.IOException'.
    Remove the declaration of thrown exception 'org.onap.optf.cmso.common.exceptions.CmsoException', as it cannot be thrown from method's body

    Issue-ID: OPTFRA-632
    Change-Id: If3645e1dbd53161280a192662fdea2ae75569fb5
    Signed-off-by: anushadasari <danush10@in.ibm.com>