Merge branch 'master-2.x-local-dev' into 'master-2.x'

Master 2.x local dev

See merge request changming.xie/tcc-transaction!4

Merge branch 'master-2.x-local-dev' into 'master-2.x'

Fix lua problem

See merge request changming.xie/tcc-transaction!1

release 2.0.1

add maxTimeTryingTreatAsFailed,
fix all the channel client connected to server auto close if no transaction store saved for a long time.

Co-Authored-By: Neumann789 <[email protected]>

Merge pull request #386 from nervose/master-2.x-local-dev

add netty length field length

prepare 2.0.0 release

fix dubbo rpc offline npe issue.

Merge branch 'refactoring-1.6.x' into master-1.6.x

* refactoring-1.6.x:
  update the tcc transaction dubbo, remove tccJavassist and tccJdk.
  update the TransactionContextEditor
  fix sample error.
  add CompensableTransactionFilter, remove TccJavassist.
  add dubbo filter

# Conflicts:
#	tcc-transaction-dubbo/src/main/java/org/mengyun/tcctransaction/dubbo/filter/CompensableTransactionFilter.java
#	tcc-transaction-dubbo/src/main/resources/META-INF/dubbo/org.apache.dubbo.rpc.Filter

update the version.