Bug 14097: Testing C4::UsageStats

Bug 14097: Testing C4::UsageStats

DESCRIPTION
-----------

Add unit tests to C4::UsageStats
Subroutine :
(V : tested, X : Not tested)

	V  NeedUpdate
	V  BuiltReport
	X  ReportToCommunity
	V  _count

TEST PLAN
---------

1. Apply patch
2. prove -v t/db_dependent/UsageStats.t
-- All tests should run successfully

/!\ I have 1 warning but I don't know where it can come /!\
(in cleanup) DBIx::Class::Storage::txn_rollback(): A txn_rollback
in nested transaction is ineffective! (depth 1) at
t/lib/TestBuilder.pm line 308

TEST PLAN OPTIONAL
------------------

Go check bug 13899 to see the coverage of this module.

Coverage BEFORE this patch :
Statement  :  40,5%
Branch     :   0,0%
Condition  :   0,0%
Subroutine :  55,6%

Coverage AFTER this patch :
Statement  :  81,0%
Branch     : 100,0%
Condition  : 100,0%
Subroutine :  88,8%

Signed-off-by: Bernardo Gonzalez Kriegel <bgkriegel@gmail.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Brendan Gallagher brendan@bywatersolutions.com
(cherry picked from commit b44b7224e079a983c991aa06eaae11c350871814)
Signed-off-by: Julian Maurice <julian.maurice@biblibre.com>