Merge pull request splunk#511 from splunk/release/1.7.3

Release/1.7.3

Merge pull request splunk#483 from splunk/release/1.7.2

Release/1.7.2

Merge pull request splunk#479 from splunk/release/1.7.1

Release/1.7.1

Merge pull request splunk#469 from splunk/release/1.7.0

Release/1.7.0

Merge pull request splunk#461 from splunk/release/1.6.20

Release/1.6.20

Merge pull request splunk#444 from splunk/release/1.6.19

Update tox.ini

Merge pull request splunk#414 from splunk/Release-1.6.18

Release 1.6.18

Merge pull request splunk#410 from splunk/release-1.6.17

Release 1.6.17

Merge pull request splunk#378 from splunk/release/1.6.16

Release/1.6.16

Merge pull request splunk#364 from splunk/release/1.6.15

Release v1.6.15