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Add docker analyticstack guides

Automatically cleanup containers after travis build finishes

Vertica Data Extract Using Sqoop

add support for docker devstack

Fix warehouse loading tasks.

* Align table field order with related test code
* Update expected result to match fixture spec

Changed User-location workflow to use user_id instead of username.

Use analytics pipeline official docker for travis tests

WIP: ENT-880 Add course key to enterprise enrollment task

Fix acceptance test input.

Change user-activity workflow to use user_id.

Exclude unloadable files at rsync time

Changed video-timeline workflow to use user_id instead of username.

Copy mysql database to bigquery dataset

* Don't include files starting with underscore.
* Switch away from dynamic dependencies for BQ load.
* Delete marker table on overwrite, at initialization.
* Add flag to skip clear_marker calls on overwrite.
* Add filtering parameter: exclude_field list.
* Always pass column names to sqoop.
* Add table-level descriptions.
* Add warehouse_subdirectory.
* Handle tinyint(N) where N>1, and output BIT as a STRING.
* Add comment on how blobs-to-BYTES doesn't work.
* Add basic unit tests.

Create an empty 'course_program_metadata' table for insights.

Don't include DownstreamMixin in "Table" Tasks.

And also remove from "Partition" tasks that don't need it.

Goal is to be able to specify overwrite_n_days on the command-line,
and not require it to have to be in config files.

Update args in running-tasks doc to use hyphens.

Make interval_start optional

Make it required only when interval is not specified.

Delete manifest file on overwrite.

Implement for module engagement to begin with, since its
ModuleEngagementDataTask class will often have the same
parameters (i.e. the given day to calculate), and therefore
uses the same manifest file when being rerun.

Renames TimestampPartitionMixin.date to TimestampPartitionMixin.datetime