GEOMESA-338,325,226 Scalding Ingest and Date Time fix WIP

* fixed date time cut issue
* added scalding map reduce ingest
* allow for ingest without datetime column/information
* skip header is no longer supported
* added java default time zone flag to ingest command in bash script
* updated pom so that slf4j issue goes away

This PR is an update to my previous scalding PR that was a bit behind the git history. The modifications to the geomesa bash script and the pom are just there so that I could get it to work, I am also not sure if the timezone java option is necessary. This PR also includes speed up ideas from @jnh5y as well as slightly expanded tests for SVIngest.
Is this the right place to point out that the date/time will be read as GMT unless an explicit offset is provided in the data?