swtbot: Look for "Eclipse" in the shell title instead of "Eclipse SDK"

This allows running the tests with the Eclipse Platform product.

Change-Id: I0027654e5b2a885d656f9610459b4d4beaa875ce
Signed-off-by: Marc-Andre Laperle <marc-andre.laperle@ericsson.com>
Reviewed-on: https://git.eclipse.org/r/36731
Reviewed-by: Marc Khouzam <marc.khouzam@ericsson.com>
Tested-by: Marc Khouzam <marc.khouzam@ericsson.com>