DatetimeIndex.normalize now accounts for nanoseconds (#5461).

datetime64(ns) uses the dts->ps which was not being set to zero in the
normalize function.
TST: Fix test case to use int64 and explicit float
Merge pull request #5469 from jtratner/series-mode-test-error

TST: Fix test case to use int64 and explicit float
Merge pull request #5472 from rockg/date-normalize

BUG: DatetimeIndex.normalize now accounts for nanoseconds (#5461).
TST: test_indexing dtype comps (GH5466)

TST don't compare invalid indices in eval operations (GH5467)

TST: invalid assignment for np.timedelta64 (GH5465)

TST: skip locale checks on windows (GH5464)

TST: dtype comp issue on windows in test_indexing (GH5466)

TST: skip test_pow on windows (GH5467)
Merge pull request #5474 from jreback/win32_fix

TST: win32 fixes