Autorest regenerated using up to date version for track 2
pom file incorporated to jacoco and dependencies for module handled
issue around capitalization of etag discrepancy fixed
no test coverage yet

Autorest regenerated using up to date version for track 2
pom file incorporated to jacoco and dependencies for module handled
issue around capitalization of etag discrepancy fixed
no test coverage yet

Autogenerate EventGrid track 2 classes using the swagger. All files except EventGridPublisherImplTests.java, pom.xml, and the swagger readme.md are autogenerated.

Convenience layer for EventGrid Track 2 on top of autogenerated code.

Add a few missing javadoc comments and remove a few comments from private methods.

test and pom edits mostly

Rename methods and use StepVerifier instead of blocking

Drop explicit support for non-JSON data. Modify/fix tests slightly.

SharedAccessSignature -> SAS, refactor methods and classes

Now fewer files should be changed in this written pr

Maven artifact not included since it hasn't published yet, some github links are broken since they point to folders that are included in this commit, however they should work once the changes are merged.

conforms to live test expected custom event properties

Variety of changes, major ones include:
- Async methods on generic getData
- Lazy list creation for send methods
- Credential methods both renamed to `credential`
- Logging errors instead of throwing
- Additional missing javadoc comments

mostly minor changes, except a small license change to all source files, including generated ones.