CppTools: Call ProjectInfo::finish when we get it

No need to require the project managers to do this. Also, it is easy to
forget.

Change-Id: I96f7a5e5547418678af9653e5753c372f0880e5a
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>

src/plugins/cmakeprojectmanager/cmakeproject.cpp

@@ -135,7 +135,6 @@ void CMakeProject::updateProjectData(CMakeBuildConfiguration *bc)
         setProjectLanguage(lid, true);
 
     m_codeModelFuture.cancel();
-    pinfo.finish();
     m_codeModelFuture = modelmanager->updateProjectInfo(pinfo);
 
     updateQmlJSCodeModel();