Update git submodules

* Update docs/submodules/policy/engine.git from branch 'master'
  to c46961c5322b8113dcf859e07e596bd7e473bc5d
  - Fix knock on tabs/SONAR/Checkstyle issues

    Changes in the last ONAP-REST review caused knock on changes in
    ONAP-PDP-REST. Those changes identified issues in two classes with tabs.
    While changing the tabs to spaces, some other easy to fix
    SONAR/Checkstyle issues were addressed.

    Issue-ID: POLICY-2132
    Change-Id: I4e32089ada7b5095da0751993458cf7173cef064
    Signed-off-by: liamfallon <liam.fallon@est.tech>

diff --git a/docs/submodules/policy/engine.git b/docs/submodules/policy/engine.git
index 87b6420..c46961c 160000 (submodule)
--- a/docs/submodules/policy/engine.git
+++ b/docs/submodules/policy/engine.git
@@ -1 +1 @@
-Subproject commit 87b642029080fbbacfb06daba15104f988ab6be0
+Subproject commit c46961c5322b8113dcf859e07e596bd7e473bc5d