Use a modern JRuby for these tests

Author: headius

gem-assembly-descriptors/src/it/assemble-project-with-gems/application/pom.xml

@@ -28,7 +28,7 @@
     <dependency>
       <groupId>org.jruby</groupId>
       <artifactId>jruby-complete</artifactId>
-      <version>1.6.6</version>
+      <version>9.4.13.0</version>
     </dependency>
     <dependency>
       <groupId>org.jruby.maven</groupId>

gem-assembly-descriptors/src/it/assemble-project-without-gems/application/pom.xml

@@ -28,7 +28,7 @@
     <dependency>
       <groupId>org.jruby</groupId>
       <artifactId>jruby-complete</artifactId>
-      <version>1.6.6</version>
+      <version>9.4.13.0</version>
     </dependency>
     <dependency>
       <groupId>org.jruby.maven</groupId>