RAT Cleanup, Resulting LICENSE fixes

Also:
- removed unused minimal javascript
- relocated storage test datagen package to hyracks-test-support
- eliminated MiniDFSCluster writes outside of target
- clean up .gitignore
- add line comments to PigletParser (taken from SQLPP.jj grammar)

Change-Id: I029dee65ac6b1d7ab7bddba66257a4857f682caa
Reviewed-on: https://asterix-gerrit.ics.uci.edu/1468
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
BAD: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Till Westmann <tillw@apache.org>
diff --git a/hyracks-fullstack/hyracks/hyracks-dataflow-std/pom.xml b/hyracks-fullstack/hyracks/hyracks-dataflow-std/pom.xml
index 8caa9ec..6cfaaa5 100644
--- a/hyracks-fullstack/hyracks/hyracks-dataflow-std/pom.xml
+++ b/hyracks-fullstack/hyracks/hyracks-dataflow-std/pom.xml
@@ -41,6 +41,20 @@
     <root.dir>${basedir}/../..</root.dir>
   </properties>
 
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.rat</groupId>
+        <artifactId>apache-rat-plugin</artifactId>
+        <configuration>
+          <excludes>
+            <exclude>src/test/resources/data/beer.txt</exclude>
+          </excludes>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+
   <dependencies>
     <dependency>
       <groupId>org.apache.hyracks</groupId>