Allow customizing of MANIFEST.MF.

Add test cases for the customization


git-svn-id: https://svn.apache.org/repos/asf/maven/maven-1/plugins/trunk@114957 13f79535-47bb-0310-9956-ffa450edef68

war/plugin.jelly

@@ -56,6 +56,9 @@
     
     <ant:echo>Building WAR ${pom.artifactId}</ant:echo>
 
+    <ant:available property="maven.war.manifest.available"
+      file="${maven.war.manifest}"/>
+
     <ant:mkdir dir="${maven.war.build.dir}" />
     <ant:jar 
          destfile="${maven.war.build.dir}/${maven.war.final.name}"
@@ -66,6 +69,10 @@
         <ant:include name="${licenseFile.canonicalFile.name}"/>
       </ant:metainf>
 
+      <j:if test="${maven.war.manifest.available}">
+        <ant:setProperty name="manifest" value="${maven.war.manifest}" />
+      </j:if>
+
       <ant:manifest>
         <ant:attribute name="Built-By" value="${user.name}" />
         <ant:section name="${pom.package}">