Enable APC extension on PHP 5.4.
Added support for expected severe log messages.
Updated DrupalKernelTest for new KernelTestBase environment.
[fixup] setExpectedLogMessage()
Fixed EntityUnitTestBase::$entityManager references container.
[fixup] Utterly bogus tests.
[FIXME] Fixed SQLite misinterprets '\_' string literal in LIKE without ESCAPE.