1073 here pull token expired error

[gabrielwol]

What this pull request accomplishes:

• add retries for access_token while maintaining same request_id
• remove some duplicate function definitions (with some extra work pull_here and pull_here_path could be further deduped)
• Apply similar task.bash structure to pull_here_path that already existed in pull_here.

Issue(s) this solves:

• Closes Refresh authentication token when waiting for queries longer than 60 minutes #204, HERE pull token_expired error #1073 (duplicate issues)

What, in particular, needs to reviewed:

What needs to be done by a sysadmin after this PR is merged

• Update data_scripts links

[gabrielwol]

As I watch a request run for 2+ hours, I was wondering how many retries we need... Here's an analysis of the 6 failures from the last two weeks and how long the requests ultimately took to receive (via emails)!

RequestID	Request Sent	Request Received	Delta
584506	17:01:05	19:21:56	2:20:51
584894	10:31:07	17:15:01	6:43:54
584946	17:01:06	18:00:04	0:58:58
585386	9:52:19	14:44:45	4:52:26
583954	17:01:06	18:31:20	1:30:14

-> going to set the limit to 8 hours.