Add support for explict success on no failure:

Using the following at end of test will explicitly mark the test as success:

    Smalltalk
        at: #'TravisCISuccessNoFailure'
        put: [ :successFilename  |
          MetacelloBuilderTravisCI successOnNoFailures: successFilename ]

Using this in tests/travisCI.st since Sample configs have no tests...

Pare down lineup for testing...

Restore unconditional `exit 1` in buildTravisStatusCheck.sh.

Cross fingers:)
tighten up syntax
the last syntax error?
those periods running off an hiding ... tsk, tsk
okay ... looks like skipMetacelloBootstrap.st needs the success on no failure handling
include test harness in the skipMetacello bootstrap case
okay down to debugging squeak4.5 failure
must have been a different failure mechanism ... setting -x in a script should not impact execution ... removing -x and crossing fingers
Merge branch 'dev'