We need to only extract payload for cases where input is coming from SCF-Web

Add Pub/Sub payload vs. PubSumMessage support

Fixes: #491
Resolves #492

Resolves #488

Fixes: #486.
Resolves #487

Polish function composition logic

This fix effectively forces all type conversion happen in function catalog

- Add 'contentType' property to ExporterProperties to assist SupplierExporter with delegating it to function catalog
- Add additional logging and testing
- Change JsonMapper to abstract class providing special handling of conversion of Json Sting to byte[]

Also, added message check in AWS destination resolver

. . . to ensure that we can have the version of FunctionRegistry that is not dependent on BeanFactory.

Resolves #480

Removed the *-readme.adoc files are no longer used

Resolves #481

Resolves #483

Add Integration Tests for GcfSpringBootHttpRequestHandler2

fix up

fix build

cleanup after merge

Added process-based server integration test support

some more refactoring

remove unneeded maven deps

address Dmitry and Dans feedback

Resolves #482

Resolves #484

Adds Readme to GCP sample app

https://github.com/GoogleCloudPlatform/functions-framework-java/commit/a3d23cc12df52cb10ee0102e50cd54eb943527e6

Also, fixing a bug in the default constructor of the invoker.

Fixes: #478.

Added static delegate context which holds target context and is also refreshed with new context on each request

Resolves #456

Resolves #468

implement HttpFunction
add headers processing
Some refactoring [WIP]
Add invoker integration test
Make test classes nested within test.
Add sample and refdoc

Resolves #468

Added implementation of JsonMessageConverter which is initialized with JsonMapper so it can delegate to Jackson or Gson based on property setting and/or availability of the underlying library.

Resolves #476

The name is the decapitalized name of the CustomRuntimeAutoConfiguration class name

Resolves #469

Added condition to the start method of the SupplierExporter to prevent it from starting for cases where there are no Suppliers in catalog

Resolves #466

At the moment support is rudimentary but given that BeanFactoryAwareFunctionRegistry provides all the necessary type conversion functionality the true fix should consider utilizing it.

Resolves #475

At the moment support is rudimentary as it does not include any type conversion, but neither does POST so it is consistent.
Given that BeanFactoryAwareFunctionRegistry provides all that functionality already perhaps the proper fix with regard to converter would be to use it or part of it in place of InMemoryFunctionCatalog currently used.

Resolves #467