Bug #4383; fixing the fact that a user's avatar image could'nt be deleted.

Conflicts:
	config-core/src/main/config/properties/org/silverpeas/social/multilang/socialNetworkBundle.properties
	config-core/src/main/config/properties/org/silverpeas/social/multilang/socialNetworkBundle_de.properties
	config-core/src/main/config/properties/org/silverpeas/social/multilang/socialNetworkBundle_en.properties
	config-core/src/main/config/properties/org/silverpeas/social/multilang/socialNetworkBundle_fr.properties
	war-core/src/main/webapp/socialNetwork/jsp/myProfil/myProfile.jsp
Merge branch 'master' of github.com:Silverpeas/Silverpeas-Core