Fix building and packaging hwi war file

hive 0.11 used to have hwi-0.11.war file but it seems that hive 13 is not configured to build a war file, instead it builds a jar file for hwi.

A fix for this would be to change jar to war in hwi/pom.xml.
Diff is below :
diff --git a/hwi/pom.xml b/hwi/pom.xml
index 35c124b..88d83fb 100644
— a/hwi/pom.xml
+++ b/hwi/pom.xml
@@ -24,7 +24,7 @@
</parent>

<artifactId>hive-hwi</artifactId>

• <packaging>jar</packaging>
  + <packaging>war</packaging>
  <name>Hive HWI</name>

Please let me know if jar was intended or is it actually a bug so that I can submit a patch for the fix.