Bug 564017 - Remove CoreResourcesPlugin activator

Remove the references to CoreResourcesPlugin activator, by rewriting the
log calls to not indirect through the Plugin class but through
`Platform.getLog()` and `PlatformUI.getWorkbench()` instead.

Change-Id: I291d131c4f60cf2c5c0d0ee44fb884d729249e9a
Signed-off-by: Alex Blewitt <alex.blewitt@gmail.com>
6 files changed