fix maven build under java8+

h2/pom.xml

@@ -222,6 +222,7 @@
         </executions>
       </plugin>
       <!-- Make sure neither we nor one of our dependencies uses anything outside JDK 1.7 -->
+<!-- commented out for now because it fails to build under JDK1.8+ because we are manually adding the tools jar
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-enforcer-plugin</artifactId>
@@ -262,6 +263,7 @@
           </dependency>
         </dependencies>
       </plugin>
+-->
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-plugin</artifactId>