QtIFW

Fix essential package update

If there was essential update available and autodependency to already
installed packages, the component containing autodependency was installed.
If there was a Replaces at the same time, the Replaces was ignored.

If there is an essential update, no other components should be installed
nor updated except essentials and the components that have autodependency
to essential component.

Task-number: QTIFW-1215
Change-Id: Ib782335f98b6af6ec546aeecb9b032cf84254256
Reviewed-by: Iikka Eklund <iikka.eklund@qt.io>