Description of problem:
maven_depmap.py creates depmap with extension "jar" even if artifact extension is "war".  Such depmaps won't work with XMvn.

Version-Release number of selected component (if applicable):
3.0.3-1

Steps to Reproduce:

$ python /usr/share/java-utils/maven_depmap.py testfrag /usr/share/maven-poms/JPP-maven-source-plugin.pom /usr/share/java/maven-source-plugin.war 

$ cat testfrag 
<?xml version="1.0" ?>
<dependencyMap>
	<dependency>
		<maven>
			<artifactId>maven-source-plugin</artifactId>
			<groupId>org.apache.maven.plugins</groupId>
			<version>2.2.1</version>
		</maven>
		<jpp>
			<artifactId>maven-source-plugin</artifactId>
			<groupId>JPP</groupId>
		</jpp>
	</dependency>
</dependencyMap>

$ ls -l /usr/share/java/maven-source-plugin.jar
ls: cannot access /usr/share/java/maven-source-plugin.jar: No such file or directory

Actual results:
Extension in <jpp> part is set to "jar", but artifact extension is "war".

Expected results:
maven_depmap.py should either set extension to "war" in <jpp> part or fail if it doesn't support war extension. Silently succeeding with broken depmap is not desired.