Don't depend on moc to disable test functions.

Don't depend on moc to disable test functions.

The moc tool is not aware of all defines (particularly those that are
compiler builtins) and does not correctly evaluate others that depend
on compiler builtins, such as Q_OS_FOO.

This commit reverts parts of the following commits, but is not a
complete fix as there were many instances of this problem in the tests
prior to those commits:
    924d810dbdcd5b5b0fa860922b2487ea9062d002
    8aaff6751038b88d17e23be6fcee945771297c5b
    338d3f11973412047c2c9cd41cbd0c961d738ef3
    a55034062ba2bf73a9f1ed3d9cf31745b38149e3
    253497b7446c7d723aa3bdd7152e25d6852f2604
    7cfad460c56319ba89c4a3a0bbcb2e54ab1cdbc6
    9d2ff58f3642828e494e7e9b2df7dbb8e2cd408f
    0cf6baa2d61ebaad2a2a0530c37f27e719b68f4b

Change-Id: I947d797fe3ec76139ba1b55561cea569895662c5
Reviewed-by: Rohan McGovern <rohan.mcgovern@nokia.com>