Fixing issue #558: Wrong sessionId used in dlform

Taking sessionId sent by the client, instead of the one used by the
Security-Proxy.
Merge branch '13.06' into 13.09

Conflicts:
	extractorapp/src/main/java/org/georchestra/extractorapp/ws/extractor/ExtractorController.java
Merge branch '13.09'

Conflicts:
	analytics/src/main/webapp/js/lib/external/ext