Change log format to ISO8601 (#1781)
Change log format to ISO8601 (#1781)

* Change log format to ISO8601

eg. 2017-06-01 19:00:09,701

* Remove extraneous timestamp.

* Compress old log files to save space.

lolski/grakn,graknlabs/grakn,graknlabs/grakn,graknlabs/grakn,lolski/grakn,lolski/grakn,lolski/grakn,graknlabs/grakn