I've mangaged to deal with XML formatting issues by changing maven-surefire-plugin version.

@wojtek Please check if those changes shouldn't be moved to the ​parent project.

Andrzej, change looks ok and I moved it to projects-parent. A couple of comments:

• we should stick to maintaining version information in projects-parent (therefore I removed it completely from tigase-server) - it helps maintaining projects configuration
• bumping pluing version should not warrant bumping version of projects-parent: to that end I decided not to use -SNAPSHOT for project parent because it defied helpfulness of having parent with common configuration - we have version 1.0.2, updating surefire plugin version without bumping version fixes the issue with garbled test ouput in all projects inheriting from this version; i.e. you have to fix it in single repository instead of dozens or more

@wojtek I agree with all the things which you mentioned about changes in a single repository. I've made my changes in tigase-server repository (not in the ​parent) just for a quick check and passed them to you for a review. If I would be sure that they should land directly in the parent, I would have put them there.