force java 1.8 on jdk11 activation profiles

pom.xml

@@ -305,7 +305,7 @@
  				</property> 
              </activation> 
 			<properties>
-                <java_version>11</java_version>
+                <java_version>1.8</java_version>
                 <maven.compiler.source>${java_version}</maven.compiler.source>
                 <maven.compiler.target>${java_version}</maven.compiler.target>
             </properties>                
@@ -481,8 +481,11 @@
                 </property>
             </activation>
 			<properties>
-				<repository>${repository.releases.url}</repository>
-			</properties>
+                <java_version>1.8</java_version>
+                <maven.compiler.source>${java_version}</maven.compiler.source>
+                <maven.compiler.target>${java_version}</maven.compiler.target>
+                <repository>${repository.releases.url}</repository>
+            </properties>                            
             <!-- Repositories for dependency resolution -->
             <repositories>
                 <repository>
@@ -699,6 +702,9 @@
                 </property>
             </activation>
 			<properties>
+                <java_version>1.8</java_version>
+                <maven.compiler.source>${java_version}</maven.compiler.source>
+                <maven.compiler.target>${java_version}</maven.compiler.target>
 				<repository>${repository.jenkins.staging.java11.url}</repository>
 			</properties>
             <!-- Repositories for dependency resolution -->