v2.1.4.RELEASE

Change log:

70d327c Downgrade to Commons HTTP Client 4.5.6
a06757d Add jackson-module-kotlin test dependency
28edf07 Upgrade dependencies; prepare for release
a98e80e More JavaUtils - hasText and BiConsumer Flavors
78b1eae Fix race in test
1d290a3 Reduce factory method complexity
4614f73 GH-892: Update contribution guidelines
2748c66 GH-900: Docs: Recovery of Declarable Beans
2f9109a Add test for channel binding
e04ae66 (editing) Editing pass for the Spring AMQP reference guide
4d34d57 Add add/remove*PPPs() in the RabbitTemplate/LCont
ae06325 @RabbitListener async result polishing
70a5b0f GH-897: Fix CL issue for AMLC$ContainerDelegate
34fd7ec Fix doc typo
6fb2187 GH-893: Add messagesPerAck prop to DirectRLCF
454e30e (modernize-docs) Modernize the look and feel and remove Docbook
c7f6148 Fix concurrency in test case
75b552f Add issue templates
b9d5e11 GH-883: Fix regression in transaction manager
f8d0fae GH-879: Doc @RabbitListener with Message
33f76fd Upgrade spring-retry