ASTERIXDB-1136: Make Java compiler target configurable via profile

Change-Id: I10378f9d3fdec9b4951f53c9b370b7741668e537
Reviewed-on: https://asterix-gerrit.ics.uci.edu/273
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Till Westmann <tillw@apache.org>
diff --git a/hyracks/hyracks-examples/btree-example/btreehelper/pom.xml b/hyracks/hyracks-examples/btree-example/btreehelper/pom.xml
index a248c96..2aa1501 100644
--- a/hyracks/hyracks-examples/btree-example/btreehelper/pom.xml
+++ b/hyracks/hyracks-examples/btree-example/btreehelper/pom.xml
@@ -53,18 +53,5 @@
   		<version>0.2.17-SNAPSHOT</version>
   	</dependency>
   </dependencies>
-  <build>
-    <plugins>
-      <plugin>
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-compiler-plugin</artifactId>
-        <version>2.0.2</version>
-        <configuration>
-          <source>1.7</source>
-          <target>1.7</target>
-          <fork>true</fork>
-        </configuration>
-      </plugin>
-    </plugins>
-  </build>
+
 </project>