Bug 12445: Improving unit tests for C4::Suggestions.pm

Bug 12445: Improving unit tests for C4::Suggestions.pm

Now, the tests used 'is' instead of 'ok', the tests are wrapped in a transaction, adding tests for the routines NewSuggestion, GetSuggestion, ModSuggestion, GetSuggestionFromBiblionumber and GetInfoFromBiblionumber.

The tests for the routines DelSuggestionsOlderThan, CountSuggestion, ConnectSuggestionAndBiblio, SearchSuggestion, GetSuggestionInfo, DelSuggestion and GetSuggestionByStatus will be arrived in another patch.

Test plan:
1/ Execute the command : prove t/db_dependent/Suggestions.t
2/ The result has to be a success without warning or error :
t/db_dependent/Suggestions.t .. ok
All tests successful.
Files=1, Tests=32,  2 wallclock secs ( 0.03 usr  0.01 sys +  1.49 cusr  0.08 csys =  1.61 CPU)
Result: PASS

Signed-off-by: Paola Rossi <paola.rossi@cineca.it>
Signed-off-by: Bernardo Gonzalez Kriegel <bgkriegel@gmail.com>
Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>