test dependent on config file

The tests should be able to pass for anyone. Tests that depend on other users should not fail if there aren't two users

ERROR: integration.test_synapseutils.test_copyFileHandleAndchangeFileMetadata
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Traceback (most recent call last):
File "/usr/local/lib/python2.7/site-packages/nose/case.py", line 197, in runTest
self.test(*self.arg)
File "/Users/lom/Dropbox/Sage/synapsePythonClient/tests/integration/test_synapseutils.py", line 517, in test_copyFileHandleAndchangeFileMetadata
syn_other.login(other_user['username'], other_user['password'])
KeyError: u'password'

Should be surrounded by try except: