Move SSH support into a dedicated library.

It does not belong into libUtils, which is a collection of small
unrelated utility classes.

Task-number: QTCREATORBUG-7218
Change-Id: Id92b9f28678afec93e6f07166adfde6550f38072
Reviewed-by: Eike Ziller <eike.ziller@nokia.com>

src/plugins/remotelinux/remotelinuxdebugsupport.cpp

@@ -47,7 +47,7 @@
 #include <QPointer>
 #include <QSharedPointer>
 
-using namespace Utils;
+using namespace QSsh;
 using namespace Debugger;
 using namespace ProjectExplorer;