qmljs: avoid storing qmltypes and qmlproject
qmljs: avoid storing qmltypes and qmlproject

qmltypes files were stored in the snapshot during scan, this is wrong
and bloats the memory usage.

Task-number: QTCREATORBUG-13369
Change-Id: Ie8c3970ad7a8d732230f3dc73a9ba65ab62ea4e9
Reviewed-by: Eike Ziller <c142da16c73a95a82d35191bcc55b22835617128@theqtcompany.com>
Reviewed-by: Fawzi Mohamed <7388270c57edd0fabd71d8eb0322d66e3c40e57e@theqtcompany.com>

amyvmiwei/qt-creator,martyone/sailfish-qtcreator,martyone/sailfish-qtcreator,xianian/qt-creator,kuba1/qtcreator,Distrotech/qtcreator,amyvmiwei/qt-creator,Distrotech/qtcreator,Distrotech/qtcreator,kuba1/qtcreator,farseerri/git_code,farseerri/git_code,amyvmiwei/qt-creator,danimo/qt-creator,Distrotech/qtcreator,xianian/qt-creator,amyvmiwei/qt-creator,xianian/qt-creator,kuba1/qtcreator,farseerri/git_code,amyvmiwei/qt-creator,danimo/qt-creator,martyone/sailfish-qtcreator,kuba1/qtcreator,AltarBeastiful/qt-creator,farseerri/git_code,danimo/qt-creator,xianian/qt-creator,kuba1/qtcreator,farseerri/git_code,danimo/qt-creator,farseerri/git_code,kuba1/qtcreator,martyone/sailfish-qtcreator,kuba1/qtcreator,kuba1/qtcreator,farseerri/git_code,martyone/sailfish-qtcreator,Distrotech/qtcreator,AltarBeastiful/qt-creator,danimo/qt-creator,amyvmiwei/qt-creator,xianian/qt-creator,amyvmiwei/qt-creator,martyone/sailfish-qtcreator,danimo/qt-creator,AltarBeastiful/qt-creator,xianian/qt-creator,kuba1/qtcreator,AltarBeastiful/qt-creator,AltarBeastiful/qt-creator,amyvmiwei/qt-creator,danimo/qt-creator,martyone/sailfish-qtcreator,martyone/sailfish-qtcreator,Distrotech/qtcreator,danimo/qt-creator,Distrotech/qtcreator,martyone/sailfish-qtcreator,xianian/qt-creator,AltarBeastiful/qt-creator,farseerri/git_code,xianian/qt-creator,AltarBeastiful/qt-creator,xianian/qt-creator,danimo/qt-creator,AltarBeastiful/qt-creator