Bug 215330

We added relevant log information in ews emails in r265302. However, logs with unicode characters results in following exception. We should handle them properly. Traceback (most recent call last): File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 1475, in gotResult _inlineCallbacks(r, g, status) File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 1421, in _inlineCallbacks status.deferred.callback(getattr(e, "value", None)) File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 460, in callback self._startRunCallbacks(result) File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 568, in _startRunCallbacks self._runCallbacks() --- <exception caught here> --- File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 654, in _runCallbacks current.result = callback(current.result, *args, **kw) File "steps.py", line 1401, in <lambda> d.addCallback(lambda res: self.analyzeResults()) File "steps.py", line 1422, in analyzeResults self.send_email_for_new_build_failure() File "steps.py", line 1492, in send_email_for_new_build_failure email_text += '\n\nError lines:\n\n{}'.format(logs) exceptions.UnicodeEncodeError: 'ascii' codec can't encode character u'\u2018' in position 108: ordinal not in range(128)