BZ(1169544,1169556, 1169557,1169559,1169560): improvements on security related to file access

Conflicts:
	guvnor-m2repo-editor/guvnor-m2repo-editor-backend/pom.xml
	guvnor-services/guvnor-services-backend/src/main/java/org/guvnor/common/services/backend/archive/ArchiveServlet.java
	guvnor-services/guvnor-services-backend/src/main/java/org/guvnor/common/services/backend/file/upload/AbstractFileServlet.java