Prep 2.2.3 (#294)
* updated Python Connector reqs
* SNOW-102876 secure sso python copy
* SNOW-141822 bumped pandas to newest versions
* SNOW-141822 bumped pandas to newest versions
* SNOW-141932 build manylinux1 wheels
* SNOW-118103 fix unclosed file issue
* SNOW-144663 added missing test directories to tox commans
* SNOW-145906 update python docs
* SNOW-143923 tox housekeeping
* SNOW-146266 updated Python test
* SNOW-146266 fix import ordering
* SNOW-145814 wrongly default keyring package
* SNOW-146213 Add google storage api url to whitelist for ocsp validation
* SNOW-67159 update column size python connector
* SNOW-145814 fix mac sso unit test with mock
* SNOW-83085 use_openssl_only mode for Python connector
* SNOW-147687 in band telemetry update python
* SNOW-144043: Add new optional config client_store_temporary_credential into SnowSQL and made it the same in python connector
* SNOW-144043 fix lint error
* SNOW-148015 Added type checking workaround for Python 3.5.1
* SNOW-121925 Adding a test to verify that the Python connector supports dashed URLs
* Revert SNOW-121925 Adding a test to verify that the Python connector supports dashed URLs
* python connector version bump to 2.2.3
* skip new sso tests on Travis
* reenabled pandas tests
