standardizing test suite names as class name under test

indra/llcharacter/tests/lljoint_test.cpp

indra/llcommon/tests/bitpack_test.cpp

indra/llcommon/tests/commonmisc_test.cpp

indra/llcommon/tests/llbase64_test.cpp

indra/llcommon/tests/lldate_test.cpp

indra/llcommon/tests/lldependencies_test.cpp

indra/llcommon/tests/llframetimer_test.cpp

indra/llcommon/tests/llprocessor_test.cpp

indra/llcommon/tests/llrand_test.cpp

indra/llcommon/tests/llsdserialize_test.cpp

indra/llcommon/tests/llstring_test.cpp

indra/llcommon/tests/lltreeiterators_test.cpp

indra/llcommon/tests/stringize_test.cpp

indra/llimage/tests/llimageworker_test.cpp

indra/llinventory/tests/inventorymisc_test.cpp

indra/llinventory/tests/llparcel_test.cpp

indra/llmath/tests/llmodularmath_test.cpp

indra/llmath/tests/llquaternion_test.cpp

indra/llmath/tests/m3math_test.cpp

indra/llmath/tests/mathmisc_test.cpp