Added namespace removal and renaming to the RESTful services.

One renaming parameter is the new name (and not the path) of a
namespace. I have redefined the ServiceConfiguration with a clearer
parameter name for passing a new name to the renaming and not a new
path.

Change-Id: I8036132a1ab8208b0f3390d5fb29d90ea9a09e1f
Signed-off-by: Peter Merkert <p.merkert@sap.com>
Added RESTful service of parameter adding to a namespace. Of course, the
test was added, too. The test works great!

Change-Id: Ieca275b84e86c6af8899927c2b2f7fa8f7578ea5
Signed-off-by: Peter Merkert <p.merkert@sap.com>