Move common classes to policy/common

Moving YamlHttpMessageConverter & CustomImplicitNamingStrategy
classes to policy/common (spring-utils sub-module).
So that the same can be used by multiple components without
duplicating it.
These classes are already covered by tests at each component.

Issue-ID: POLICY-3931
Change-Id: I8fc6978b585bfcd930e0916f67961d05946d207c
Signed-off-by: Ram Krishna Verma <ram_krishna.verma@bell.ca>
diff --git a/pom.xml b/pom.xml
index 2e544bc..af783c8 100644
--- a/pom.xml
+++ b/pom.xml
@@ -62,6 +62,7 @@
         <module>integrity-audit</module>
         <module>integrity-monitor</module>
         <module>policy-endpoints</module>
+        <module>spring-utils</module>
     </modules>
 
     <dependencyManagement>