Fix DTD validation of the GetCapabilities document in WMS 1.1.1

The Capabilities document we get when requesting the WMS 1.1.1 of Constellation does not comply with the DTD defined in the header.
Fix various validation errors, in order to fully pass the Cite tests for WMS 1.1.1

First step: remove the namespaces definitions of the root tag WMT_MS_Capabilities.
Second step: fix wms 1.1.1 binding xml to fully comply with the DTD.