CLN: Deprecation of assertAlmostEquals

#7131: s/self.assertAlmostEquals(/self.assertAlmostEqual(
Merge pull request #7166 from bwignall/issue7131_assertalmostequals

CLN: Deprecation of assertAlmostEquals
CI: use current versions for excel / dateutil / pytz on 3.4 build
Merge pull request #7170 from jreback/new

CI: use current versions for excel / dateutil / pytz on 3.4 build