Update git submodules

* Update docs/submodules/policy/apex-pdp.git from branch 'master'
  to 923a9943a1d59a9d1e87d24490eea78fa9869de7
  - Use Assertions class from policy-common
    
    Change import line in all classes that use
    the Assertions class, there are a lot of them.
    
    Issue-ID: POLICY-1264
    Change-Id: I8480264be4e36348b3fc63acf1bc36e9c9dd250b
    Signed-off-by: liamfallon <liam.fallon@est.tech>
    
1 file changed