testutils: fix for build and run regression tests

* Addresses problem with duplicit application context creation.

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>
BibRank: regression tests fix

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>
OAIRepository: regression tests fix

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>
WebAlert: regression tests fix

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>
WebJournal: regression tests fix

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>
plotextractor: regression tests fix

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>
DocExtract: regression tests fix

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>