[kotlin (all)] added property to pom.xml to inform we are using java 11.

Author: gserrano

component-kotlin/pom.xml

@@ -25,6 +25,10 @@
   <packaging>maven-archetype</packaging>
   <description>OpenTable Spring Component archetype for Kotlin</description>
 
+  <properties>
+    <project.build.targetJdk>11</project.build.targetJdk>
+  </properties>
+
   <dependencies>
     <dependency>
       <groupId>org.springframework</groupId>

service-mvc-kotlin/pom.xml

@@ -25,6 +25,10 @@
   <packaging>maven-archetype</packaging>
   <description>OpenTable Spring MVC Service Kotlin archetype</description>
 
+  <properties>
+    <project.build.targetJdk>11</project.build.targetJdk>
+  </properties>
+
   <dependencies>
     <dependency>
       <groupId>org.springframework</groupId>