Better-organized HTTP client used for tests and add full-response option

Use middleware impl for test util fn bind-current-user

Bump Jetty server version

Don't strip insights from response in public links

Merge release 0.31.0 into master

Simplify SparkSQL driver; fix nested query support

BigQuery nested query support

Remove BigQuery driver custom implementation of field->alias

Typo fixes and other code cleanup 

* Dash card display fixes (#8777)

* fix scalar long title ellipsification and description

* fix table simple in night mode

* check for description

* v0.31.0-RC1

* add scroll to outer container for database / schema selector (#8782)

add scroll to outer container for database / schema selector

* Fix minification

* Far-future cache header for JS/CSS files with cache-busting query strings

* Add Snowflake to list of supported databases in dox [ci skip]

* scroll table selector (#8857)

Frontend perf fixes 0.31

Add Snowflake to list of supported databases in dox

Add a C3P0 exclusion to Quartzite [ci drivers]

Frontend loading performance fixes

add scroll to outer container for database / schema selector

Only include a CSV attachment for pulses when XLS is not selected

Previously we would always include a CSV attachment when there were
more rows/columns than would be included in the table. This ended up
being redundant for users that would prefer an XLS attachment and have
indicated that the pulse should include an XLS attachment. This commit
will only not attach a CSV if the user has select an XLS attachment
for that pulse.

Fixes #7302

Add better error messages to loading GeoJSON files

Previously the only error message was a schema validation failure. The
same error would be given for an unreachable host, unparsable JSON,
bad URL etc. This commit attempts to separate that out and provide a
better message in the failure case.

Fixes #8793

Fix test checksum test failure on MySQL [ci drivers]

The newly added checksum tests fail when running on MySQL in
Circle. The MySQL tests include a secret key for encryption which are
used when computing the checksum. Because of that encryption, the
checksum string is different every time (it must be decrypted before
compared). The test isn't covering the encryption code but is only
concerned with ensure the datastructure hashes consitently. This
commit uses a `with-redefs` to set that secret key to `nil` so that
encryption won't be used on those two tests.

* fix import

* clean up nav