Prepare for csit

add tag:latest for policy agent and simulator

Issue-ID: NONRTRIC-115
Signed-off-by: YongchaoWu <yongchao.wu@est.tech>
Change-Id: I5dc71a52541a62e1f6774420ebeb847192eefdd5
diff --git a/near-rt-ric-simulator/pom.xml b/near-rt-ric-simulator/pom.xml
index 4b66634..9cd0645 100644
--- a/near-rt-ric-simulator/pom.xml
+++ b/near-rt-ric-simulator/pom.xml
@@ -96,6 +96,7 @@
                       <dockerFile>Dockerfile</dockerFile>
                       <tags>
                         <tag>${project.version}</tag>
+                        <tag>latest</tag>
                       </tags>
                     </build>
                   </image>
diff --git a/policy-agent/pom.xml b/policy-agent/pom.xml
index daad418..b07fdc1 100644
--- a/policy-agent/pom.xml
+++ b/policy-agent/pom.xml
@@ -314,6 +314,7 @@
                                         </args>
                                         <tags>
                                             <tag>${project.version}</tag>
+                                            <tag>latest</tag>
                                         </tags>
                                     </build>
                                 </image>