Run mvn formatter:format for better code style/format

[wing328]

Description

Run mvn formatter:format for better code style/format

Swagger-codegen version

Latest master

Related PR

#4214

[nickcmaynard]

Part of #3972.

Once you've done this, I'll do the easy bits and clear up modules swagger-codegen-cli, swagger-codegen-maven-plugin and swagger-generator. swagger-codegen is going to be more of a community effort.

[nickcmaynard]

@wing328 are you planning on this as part of the v2.2.2 push, or sooner? I recall the plan (from #4214) was to do it after merging some v2.3.0 changes, but I'm not sure if this has ben lost.

[wing328]

@nickcmaynard yes, still in our plan.

@cbornet is helping me to sync master to 2.3.0 due to some conflicts related to Java's datetime dependencies.

We'll run the formatter after the sync.

[nickcmaynard]

Thank you.

[wing328]

UPDATE: Run mvn formatter:format for swagger generator, cli and maven-plug-in:
1e53557
eb498e2
38b0725

For "swagger-codegen", it will result in a lot of merge conflicts for the existing PRs. We'll do it after releasing 2.3.0 and merge more PRs to avoid spending too much time resolving merge conflicts.