BUG: Same test function in different file causes conflict

Having the same templated function name in multiple test file for the
same executable can cause the symbols to be mixed up. This patch
addresses a number of TIFF failing tests on OSX with genuine gcc 4.2.

Change-Id: If304ebcf5dbab53e8d7df78eeada7c1a82d492f2
Merge branch 'FixMersenneTwisterGetInstanceThreading' into release

Change-Id: I5d23e73779daa361008da80838209c76a81c6e71
Merge branch 'imagebase-invalid-read-release' into release

Change-Id: I00e8842fdc34a8f89341de3a2dd363e376b60f84
Merge branch 'release'

Conflicts:
	Modules/IO/TIFF/test/itkTIFFImageIOCompressionTest.cxx

Change-Id: Ia4884b0d16e0d16fc5a7bf037da994726f886854