java 11 upgrade and sonar scan fixes

Recompile java source code using jdk11
Run in ojdk11 JRE
tomcat container upgrade
alpine base image

Issue-ID: DCAEGEN2-2298

Change-Id: Ic4bf2626e5805508589cafe52b7c4e91d7ae3580
Signed-off-by: Kotagiri, Ramprasad (rp5662) <rp5662@att.com>
diff --git a/pom.xml b/pom.xml
index 4c779e8..180e0dc 100644
--- a/pom.xml
+++ b/pom.xml
@@ -21,6 +21,8 @@
     <properties>
         <enforcer.skip>true</enforcer.skip>
         <sonar.exclusions>**/external/**</sonar.exclusions>
+        <maven.compiler.source>11</maven.compiler.source>
+        <maven.compiler.target>11</maven.compiler.target>
     </properties>
 
     <modules>
@@ -48,6 +50,14 @@
 		        <generateBackupPoms>false</generateBackupPoms>
 		    </configuration>
 			</plugin>
+			<plugin>
+			    <groupId>org.apache.maven.plugins</groupId>
+			    <artifactId>maven-compiler-plugin</artifactId>
+			    <version>3.8.0</version>
+			    <configuration>
+			        <release>11</release>
+			    </configuration>
+			</plugin>
 		</plugins>
     </build>