Update more mocks

Author: camdecoster

test/image/mocks/ohlc_first.json

@@ -962,7 +962,7 @@
   ],
   "layout": {
     "xaxis": {
-      "range": [1472577187875, 1475225280000]
+      "range": ["2016-08-30 17:13:07.875", "2016-09-30 08:48"]
     },
     "yaxis": {
       "tickprefix": "$",

test/image/mocks/range_selector_style.json

@@ -808,7 +808,7 @@
       },
       "domain": [0.52, 1],
       "type": "date",
-      "range": [-694292400000, 1444622400000],
+      "range": ["1948-01-01 05:00", "2015-10-12 04:00"],
       "autorange": true
     },
     "yaxis": {
@@ -844,7 +844,7 @@
           "family": "Raleway, sans-serif"
         }
       },
-      "range": [1420088400000, 1444622400000],
+      "range": ["2015-01-01 05:00", "2015-10-12 04:00"],
       "type": "date"
     },
     "yaxis2": {