Class implementing a log observer (can be passed to 
  BuildStep.addLogObserver().
  It parses the output of mysql-test-run.pl as used in MySQL, MariaDB, 
  Drizzle, etc.
  It counts number of tests run and uses it to provide more accurate 
  completion estimates.
  It parses out test failures from the output and summarises the results
  on the Waterfall page. It also passes the information to methods that can
  be overridden in a subclass to do further processing on the 
  information.
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          | openTestFail(self,
        testname,
        variant,
        result,
        info,
        line) | 
          
            source code
            
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          | doCollectTestFail(self,
        testname,
        variant,
        result,
        info,
        text) | 
          
            source code
            
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          | collectTestFail(self,
        testname,
        variant,
        result,
        info,
        text) | 
          
            source code
            
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     Inherited from buildstep.LogLineObserver:
      errLineReceived,
      errReceived,
      outReceived,
      setMaxLineLength
       
    Inherited from buildstep.LogObserver:
      __providedBy__,
      __provides__,
      logChunk,
      setStep
       
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