Avoid build path errors due to o.e.s.view.ext.impl.test

build.properties and .classpath were still referencing deleted
source and target directories. Corresponding entries in the files
have been commented now.

Change-Id: Ie4a2e538500e816965c616a07c7a677db79d4b4c
Signed-off-by: Michael Ochmann <michael.ochmann@sap.com>