Update ion-java to 1.2.0 which has automatic module name

Author: varunnvs92

pom.xml

@@ -82,7 +82,7 @@
     <properties>
         <awsjavasdk.version>${project.version}</awsjavasdk.version>
         <jackson.version>2.9.3</jackson.version>
-        <ion.java.version>1.0.2</ion.java.version>
+        <ion.java.version>1.2.0</ion.java.version>
         <commons.lang.version>3.4</commons.lang.version>
         <wiremock.version>2.18.0</wiremock.version>
         <slf4j.version>1.7.25</slf4j.version>