Add ability to disable OAS compacted emission

[postatum]

This PR addresses issues discussed here #364. In particular it makes possible to disable OAS 2.0, OAS 3.0 "compacted" emission added by this commit f4a8294.

Compacted emission can be disabled with RenderOptions().withoutCompactedEmission.

amf-core part of necessary changes is here aml-org/amf-core#98

I suggest you squish the PR as it contains a lot of unnecessary commits I did when trying to figure out how things work.

[postatum]

The build fails because amf-core PR was not merged/released yet:

[error] /home/travis/build/aml-org/amf/amf-webapi/shared/src/main/scala/amf/plugins/document/webapi/OasPlugin.scala:172:17: value isWithCompactedEmission is not a member of amf.core.emitter.RenderOptions

[error]     if (options.isWithCompactedEmission) {

[AgustinBettati]

Hello @postatum, thank you for opening the PR.
I have a few comments to add regarding the changes you have made. You will see that OasSpecEmitterContext has a Boolean variable to disable compactEmission. Using this variable directly will significantly reduce the amount of code that has to be changed, there is no need to create the InlinedContext which forces you to to handle specific cases in emission. You will only have to modify RenderOptions, both OasPlugins in the specContext method, and include tests.
It would be great if your could update both of your branches (in amf and amf-core) with these adjustments and squash them into a single commit.

[postatum]

Hello @postatum, thank you for opening the PR.
I have a few comments to add regarding the changes you have made. You will see that OasSpecEmitterContext has a Boolean variable to disable compactEmission. Using this variable directly will significantly reduce the amount of code that has to be changed, there is no need to create the InlinedContext which forces you to to handle specific cases in emission. You will only have to modify RenderOptions, both OasPlugins in the specContext method, and include tests.
It would be great if your could update both of your branches (in amf and amf-core) with these adjustments and squash them into a single commit.

Hi @AgustinBettati!
Thanks for the feedback. I reworked the PR the way you've suggested and created a different PR with squished commits: #668