tmf: Refactor resource change listener in project model

tmf: Refactor resource change listener in project model

- Move resource change listener from every project element to the
project registry

- Create project in a WorkspaceModifyOperation to combine the many
resource change events into one.

- Only refresh the projects affected by the resource change event

- Update the model in the current thread on refresh

- Move the refresh from the project element to the base model element

- Refreshing the model children moved from the navigator content
provider to each specific model element

- Change getChildren from navigator content provider to simply return
the children list, that is now updated separately (as described above)

- Remove project from the registry when it is deleted

- Modify project registry to populate the model when getting a project
element for the first time

- Remove various unnecessary refresh of the model accordingly

- Do all modifications from the rename trace handler in a single
workspace modify operation

- Refresh all affected projects in the select trace type handler

Change-Id: I7e080e6b10617786a715e3cb39bf297b79168998
Signed-off-by: Patrick Tasse <patrick.tasse@gmail.com>
Reviewed-on: https://git.eclipse.org/r/19882
Tested-by: Hudson CI
Reviewed-by: Genevieve Bastien <gbastien+lttng@versatic.net>
IP-Clean: Genevieve Bastien <gbastien+lttng@versatic.net>
Tested-by: Genevieve Bastien <gbastien+lttng@versatic.net>