This changes the prefixes of the symbols generated from USEMODULE and
USEPKG variables. The changes are as follow:
KCONFIG_MODULE_ => KCONFIG_USEMODULE_
KCONFIG_PKG_ => KCONFIG_USEPKG_
MODULE_ => USEMODULE_
PKG_ => USEPKG_
This test needs the pool size for limit objects set to 3 by default so
it does not fail. As this is done with the 'app.config' file, we
explicitly disable Kconfig by default.