This patch also sets the minimumQbsVersion to 1.7 because that's the version
that is actually documented as being required in the README.

Change-Id: I862daaf5fa34ab2cc5db47581689e08aa34f0910
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>
Reviewed-by: Eike Ziller <eike.ziller@qt.io>
Reviewed-by: Jake Petroules <jake.petroules@qt.io>