u-number inside Application properties

Also excption Exception in thread main java.lang.IllegalArgumentException:
 Cannot union streams of different types:
  CoderTypeInformation{coder=WindowedValue$
  FullWindowedValueCoder(KvCoder(NullableCoder(StringUtf8Coder)
  ,org.apache.beam.sdk.coders.AvroCoder@b03f3cea),IntervalWindow)}
  and
  CoderTypeInformation{coder=WindowedValue$
  FullWindowedValueCoder(KvCoder(NullableCoder(StringUtf8Coder)
  ,NullableCoder(org.apache.beam.sdk.coders.AvroCoder@b03f3cea)),IntervalWindow)}
 by just using the raw not NullableCoder

move all classes from old samza project to common pipeline project

Put inputTopic and bootstrapServer variable inside AbstractPipeline

Co-authored-by: Nico Biernat <stu209212@mail.uni-kiel.de>

Configure the Kafka Streams configuration in a common class and not
add them in every UC application. This enhances maintainability of
common shared configurations.
Further enable more configurations to set for the Kafka Streams
application.

Replace the kieker records for reading and writing to/from kafka
with the avro records from Titan.

- add application name and version as a property
- checkstyle cleanups