NIFI-6323 Changed URLs for splunk.artifactoryonline.com to use HTTPS (certificate validity warning in browsers, but command-line connection using openssl s_client is successful).
NIFI-6323 Changed URLs for XMLNS schema locations to use HTTPS (the XMLNS and schema identifier remain http:// because they are not designed to be resolvable).
NIFI-6323 Fixed Maven XML schema descriptor URLs.
This closes#3497
NIFI-4061 Initial version of RedisStateProvider
- Adding PropertyContext and updating existing contexts to extend it
- Added embedded Redis for unit testing
- Added wrapped StateProvider with NAR ClassLoader in StandardStateManagerProvider
- Updating state-management.xml with config for RedisStateProvider
- Renaming tests that use RedisServer to be IT tests so they don't run all the time
This closes#1918.