XD-1766 Fixing failing tcptofile test

 - Added --outputType=text/plain option to tcp source as
   that is now required.
XD-1650 Update HDFS sink to accept a partition strategy

- Upgrade to SHDP 2.0.0.RC4
- Related work for SHDP-334
- New hdfs sink options; partitionPath, fileUuid and fileOpenAttempts
- Changes to XD YARN application.yml files due to changes in SHDP RC4 boot config model
- HdfsStoreMessageHandler is now abstract and new implementations for normal and partition writer.
- Namespace parsers now building writer and adapter via factories
-  volatile StoreWriterFactoryBean variables
- Use StandardEvaluationContext instead of EvaluationContext
- Change constructors to use StandardEvaluationContext directly.
- Casting from EvaluationContext to StandardEvaluationContext now happens earlier in a factory which gets it from IntegrationEvaluationContextAware.
- We now fail in MessageExpressionMethods if evaluation context is null instead of creating it manually.
- Remove ctors without an EvaluationContext in MessageExpressionMethods and MessagePartitionStrategy