Create PolicyExecutor Stub

- Generate interface from OpenApi in RTD docs
- Fixed Content Type in OpenAPI
- Fixed Paths in OpenAPI
- Made Authorization header compulsory in OpenAPI
- All 'enum' values in OpenAPI lowercase (in linr with CPS/NCMP conventions)
- Added impl with some basic functionality
- Added testware
- Pom includes docker image creation
- Docker compose updated to deploy stub

Issue-ID: CPS-2301
Change-Id: I462ad5c70474b2813fc04005c0d20a1b15b574ec
Signed-off-by: ToineSiebelink <toine.siebelink@est.tech>
Signed-off-by: sourabh_sourabh <sourabh.sourabh@est.tech>
diff --git a/cps-parent/pom.xml b/cps-parent/pom.xml
index 591095a..ba63944 100644
--- a/cps-parent/pom.xml
+++ b/cps-parent/pom.xml
@@ -368,6 +368,7 @@
                         <exclude>org/onap/cps/ncmp/rest/model/*</exclude>
                         <exclude>org/onap/cps/**/*MapperImpl.class</exclude>
                         <exclude>org/onap/cps/ncmp/rest/stub/*</exclude>
+                        <exclude>org/onap/cps/policyexecutor/stub/model/*</exclude>
                     </excludes>
                 </configuration>
                 <executions>