Change NeTEx source branch from update_dsj to master

Align with master branch (32f88ec) to use the main NeTEx
source branch for XSD downloads.

Author: vpaturet

pom.xml

@@ -67,7 +67,7 @@
         <jdk.version>1.8</jdk.version>
 
         <netexRepoName>NeTEx</netexRepoName>
-        <netexBranch>update_dsj</netexBranch>
+        <netexBranch>master</netexBranch>
         <netexGithubUrl>https://github.com/entur/${netexRepoName}</netexGithubUrl>
         <netexVersion>1.16</netexVersion>