BundleComponent.getHost()

Removed unneeded synchronization in ApiBaseline / Component and related
classes.

Change-Id: Id119d3d00c6faa5c3e08dd82f58adc6deb573b06
Signed-off-by: Andrey Loskutov <loskutov@gmx.de>
Reviewed-on: https://git.eclipse.org/r/c/pde/eclipse.pde.ui/+/189712
Tested-by: PDE Bot <pde-bot@eclipse.org>