Fix empty tag for version prefix

Author: arteymix

pom.xml

@@ -287,7 +287,7 @@
 						<productionBranch>master</productionBranch>
 						<developmentBranch>development</developmentBranch>
 						<releaseBranchPrefix>release-</releaseBranchPrefix>
-						<versionTagPrefix></versionTagPrefix>
+						<versionTagPrefix/>
 						<origin>origin</origin>
 						<!-- Unused for releasing -->
 						<featureBranchPrefix>feature-</featureBranchPrefix>