killbill-memoizeit

jaxrs: Add missing swagger ApiModel parent property

jaxrs: Fix incorrect enum type in some query parameters

jaxrs: Fix content type for text media resources

jaxrs: Add missing swagger return types

Merge remote-tracking branch 'killbill/work-for-release-0.19.x' …

into work-for-release-0.19.x

invoice: Fix issue in usage billing (DETAIL mode) when first …

tier(s) have been defined with a $0 price

The code will ensure that there is a USAGE row for all tier level regardless of whether amount is positive or null.
The USAGE code assumes that such entries exist, and also from a product point of view this can be useful -- or can be easy to filter out.

Merge remote-tracking branch 'killbill/work-for-release-0.19.x' …

into work-for-release-0.19.x

jaxrs: Enhnace our catalog endpoints to take an optional accountId …

parameter to allow fetching per-account catalog - advanced catalog plugin use case.

[maven-release-plugin] prepare for next development iteration

[maven-release-plugin] prepare release killbill-0.19.14