Resolve rooibos warnings

[iBicha]

Warnings during test run, coming from rooibos. Not nice if you want to force "warnings as errors" in your code base

BRIGHTSCRIPT: WARNING: unused variable 'ev' in anonymous function in pkg:/source/rooibos/BaseTestReporter.brs(12)
BRIGHTSCRIPT: WARNING: unused variable 'ev' in anonymous function in pkg:/source/rooibos/BaseTestReporter.brs(15)
BRIGHTSCRIPT: WARNING: unused variable 'invocation' in anonymous function in pkg:/source/rooibos/BaseTestSuite.brs(1692)
BRIGHTSCRIPT: WARNING: unused variable 'returnvalue' in anonymous function in pkg:/source/rooibos/BaseTestSuite.brs(1692)
BRIGHTSCRIPT: WARNING: unused variable 'invocation' in anonymous function in pkg:/source/rooibos/BaseTestSuite.brs(1739)
BRIGHTSCRIPT: WARNING: unused variable 'casesensitive' in function 'rooibos_common_findelementindexinarray' in pkg:/source/rooibos/CommonUtils.brs(524)
BRIGHTSCRIPT: WARNING: unused variable 'depth' in anonymous function in pkg:/source/rooibos/ConsoleTestReporter.brs(1)
BRIGHTSCRIPT: WARNING: unused variable 'ev' in anonymous function in pkg:/source/rooibos/JUnitTestReporter.brs(8)
BRIGHTSCRIPT: WARNING: unused variable 'name' in anonymous function in pkg:/source/rooibos/Utils.brs(17)
BRIGHTSCRIPT: WARNING: unused variable 'field' in anonymous function in pkg:/source/rooibos/Utils.brs(48)
BRIGHTSCRIPT: WARNING: unused variable 'callback' in anonymous function in pkg:/source/rooibos/Utils.brs(48)
BRIGHTSCRIPT: WARNING: unused variable 'offset' in anonymous function in pkg:/source/rooibos/Utils.brs(50)
BRIGHTSCRIPT: WARNING: unused variable 'count' in anonymous function in pkg:/source/rooibos/Utils.brs(50)
BRIGHTSCRIPT: WARNING: unused variable 'children' in anonymous function in pkg:/source/rooibos/Utils.brs(53)
BRIGHTSCRIPT: WARNING: unused variable 'field' in anonymous function in pkg:/source/rooibos/Utils.brs(55)
BRIGHTSCRIPT: WARNING: unused variable 'callback' in anonymous function in pkg:/source/rooibos/Utils.brs(55)