Add code to publish to PDP

Added code to take an arbitrary object and send it to PDPs using a
topic sink.  Does not include the code or properties needed to
configure the topic.

Fixed method name - test case does not cover what the method name
implied.
Fixed some comments.

Add test to verify that the PdpClient works with a real TopicSink.

Moved coder classes to policy/common.

Change-Id: I4dec746b07d384c5d9d1449ca91fa39a4f680260
Issue-ID: POLICY-1444
Signed-off-by: Jim Hahn <jrh3@att.com>
diff --git a/pom.xml b/pom.xml
index a1d3378..91f9f85 100644
--- a/pom.xml
+++ b/pom.xml
@@ -26,7 +26,7 @@
     <parent>
         <groupId>org.onap.policy.parent</groupId>
         <artifactId>integration</artifactId>
-        <version>2.0.0</version>
+        <version>2.1.0-SNAPSHOT</version>
         <relativePath />
     </parent>