Update git submodules

* Update docs/submodules/policy/apex-pdp.git from branch 'master'
  to 9520a45c23ef2d0dc3130b0b885800a9df911fd7
  - Merge "Fix Sonar/Checkstyle issues in apex-pdp"
  - Fix Sonar/Checkstyle issues in apex-pdp

    BBS Java code introduced Sonar issues, these are resolved.
    Also fixed checkstyle errors in other classes.
    Also fiexed "unexpected type" eclipse errors.

    Issue-ID: POLICY-1791
    Change-Id: I3931051f0944c6d53745c8dd1db7cca4ee118f1c
    Signed-off-by: liamfallon <liam.fallon@est.tech>

diff --git a/docs/submodules/policy/apex-pdp.git b/docs/submodules/policy/apex-pdp.git
index ce9d82d..9520a45 160000 (submodule)
--- a/docs/submodules/policy/apex-pdp.git
+++ b/docs/submodules/policy/apex-pdp.git
@@ -1 +1 @@
-Subproject commit ce9d82d2c0e863597d84cc8909955e398405f45a
+Subproject commit 9520a45c23ef2d0dc3130b0b885800a9df911fd7