Increase logging output from spring-xd-ui

This is necessary in order to diagnose failures on specific environments
Reverting build changes and restoring output levels
Ignoring SecurityConfigurationTests

Temporary, pending investigation on CI issues
Update readme to reference 1.0.1
Remove Kafka source and docs
More Kafka removal
Revert back to 1.0.1.SNAPSHOT for second pass at release
Release version 1.0.1.RELEASE
merge 1.0.1 release branch
XD-1329 Add Kafka source module

- Add kafka source module with consumer configurations
- Add `spring-xd-extension-kafka` subproject
  - Add Kafka module options mixin and  source module options metadata

Fix code review comments
  - Add kakfa zkconnect chroot path for kafka zk namespace
     - Allow the `zkconnect` property be overridden via modules.yml/kafka.properties
  - Update javadoc for StringDecoder
  - Update kafka inbound channel adapter's poller interval to `100ms` and
    max-messages per poll to `-1` which is unlimited.

Add `encoding` module option for string ValueDecoder

- Use `util:properties` for consumer-properties
  - Add config/kafka-consumer.properties to externalize the properites

Add Kafka Message transformer
  - Message transformer that transforms the kafka messages into
Map<Integer,Object> where key is partition index and value is payload.
XD-2214 HTTP SSL Source Fixes

XD-2214 Fix typo in httpSSL.properties

XD-2214 (cont) Use the keystore password instead of the hardcoded value
XD-2059 Add retry for remote file copy FilePollHdfsTest

FilePollHdfs sporadically fails to create files on remote machines

* Added waitForJobToComplete instead of waitForXD
* createDataFileOnRemote retries to create data file if file is not present of data of file is incorrect, up until wait time is exhausted.