Improve CPPUNIT_ASSERTs

Change-Id: I971602ce562ae0e11be5ac7b4d1eefbd342b625c
Avoid inaccurate floating-point computations

...otherwise at least my --disable-dbgutil --disable-debug Linux x86_64 build
failed the CppunitTest_sax_cpputest with 8999999 vs. 9000000 nanoseconds.

Change-Id: I05e0febf413f9f9e01227a0cc4e0f46a5243fe61
Fix naming

Change-Id: Ia7c62d57c56a27e097dbe252b6c6cac8fba7ace5