Unable to test against JRuby 9.2.7.0

[BanzaiMan]

The reason for using the stable RVM for JRuby is

Unable to install jruby 9.1.14 and later via RVM

Since yesterday, all attempts to install jruby versions from 9.1.14 onwards (9.1.15… and so on) fail. The error is Unknown ruby string (do not know how to handle): jruby-9.1.14. Requested binary installation but no rubies are available to download, consider skipping --binary flag. An example of such run is here https://travis-ci.org/kubamahnert/gooddata-ruby/jobs/476397742 This error looks very closely related to this jruby issue, where they stopped mirroring versions newer than 9.1.14 - ht…