exclude avro extension dependencies that are already included in druid core libraries

[clintropolis]

Description

While working on NOTICE stuff for 0.16.0, noticed avro extension had a lot of dependencies that were already included in lib/ folder of package, so I have excluded them from the avro extension pom.

before:

$ ls -1
avro-1.9.0.jar
avro-ipc-1.9.0.jar
avro-ipc-jetty-1.9.0.jar
avro-mapred-1.9.0.jar
commons-compress-1.18.jar
commons-lang3-3.5.jar
druid-avro-extensions-0.16.0-incubating-SNAPSHOT.jar
gson-2.3.1.jar
javax.annotation-api-1.3.2.jar
javax.servlet-api-3.1.0.jar
jersey-client-1.15.jar
jersey-core-1.19.3.jar
jetty-http-9.4.10.v20180503.jar
jetty-io-9.4.10.v20180503.jar
jetty-security-9.4.10.v20180503.jar
jetty-server-9.4.10.v20180503.jar
jetty-servlet-9.4.10.v20180503.jar
jetty-util-9.4.10.v20180503.jar
jsr311-api-1.1.1.jar
kafka-schema-registry-client-3.0.1.jar
schema-repo-api-0.1.3.jar
schema-repo-avro-0.1.3.jar
schema-repo-client-0.1.3.jar
schema-repo-common-0.1.3.jar
velocity-engine-core-2.0.jar

after:

$ ls -1
avro-1.9.0.jar
avro-ipc-1.9.0.jar
avro-ipc-jetty-1.9.0.jar
avro-mapred-1.9.0.jar
druid-avro-extensions-0.16.0-incubating-SNAPSHOT.jar
gson-2.3.1.jar
javax.annotation-api-1.3.2.jar
jersey-client-1.15.jar
kafka-schema-registry-client-3.0.1.jar
schema-repo-api-0.1.3.jar
schema-repo-avro-0.1.3.jar
schema-repo-client-0.1.3.jar
schema-repo-common-0.1.3.jar
velocity-engine-core-2.0.jar

[clintropolis]

tested indexing avro file in hadoop, succeeded