Feature/odd 949 metrics

[chuanlin2018]

http://mml.nist.gov:8080/browse/ODD-949

This branch added a metrics page to PDR. To test, run it in oar-docker using branch feature/updatelogs.

1. Use following url to test the landing page. Confirm that a new "Dataset Metrics" block was added to the right side green menu and there should be some metrics data in it.

https://localhost/od/id/ECBCC1C130222ED9E04306570681B10740

2. Click on "More..." in the green menu block. The metrics page should display (refer to the Jira ticket ODD-949 for the screenshots). Confirm the following:

• Make sure the page display correct dataset title.
• The dataset summary should match the display in the landing page.
• When mouse over a bar in the chart, the bar should be highlighted and a tooltip with file name and total times of downloads should display. A yellow dash line at the end of the bar should also display.
• There is only one bar in the above example. When multiple bars are available, make sure the Ascending, Descending and Original radio buttons work properly.
• Make sure the tree table display correct data.
• Make sure "Download Metrics" saves the metrics data in correct csv format.
• Make sure "Download Graphics" saves the bar chart in png format.

[chuanlin2018]

Tested in local docker.

[chuanlin2018]

Tested in local docker.