Http Avro Serializer and tests
re-format test files
Merge branch 'master' of https://github.com/Microsoft-CISL/REEF into juwang-httpAvroSerilazer
adding negative test cases for AvroHttpSerializer
add final and rename for variables
Merge branch 'master' of https://github.com/Microsoft-CISL/REEF into juwang-httpAvroSerilazer
handle exceptions in test
add test Jetty Handler test cases
Merge branch 'master' of https://github.com/Microsoft-CISL/REEF into juwang-httpAvroSerilazer
Merge branch 'juwang-httpAvroSerilazer' of https://github.com/Microsoft-CISL/REEF into juwang-TestJettyHandler
reef webserver reformat
rename a variable
add TestHttpServer
Add tests for reef-webserver

Add tests for HttpServer, HttpConfiguration, ReefEventStateManager
Merge branch 'master' into juwang-httpAvroSerilazer
Merge branch 'juwang-httpAvroSerilazer' into juwang-TestJettyHandler
add newline at the end of the avro/webRequest.avsc file
fix httpServerPortRetryTest
test case update as port is not always ensured
httpServerPortRetryTest update