Fix tests macos
Added some #define BOOST TEST_DYN_LINK to make tests compile on Max OSX and also change the Field initialiation to not call the optimisation setup (which considerably speeds up the test when first ran)
Added some #define BOOST TEST_DYN_LINK to make tests compile on Max OSX and also change the Field initialiation to not call the optimisation setup (which considerably speeds up the test when first ran)