assert(Not)?Includes: check for failure of _includes
assert(Not)?Includes: check for failure of _includes

Call _includes and then check its return value.

shunit2 uses the exit code to test, not a string of 0 or 1 as was done
previously.

ndbroadbent/scm_breeze,ndbroadbent/scm_breeze,scmbreeze/scm_breeze,scmbreeze/scm_breeze