Motivation:
I want to allow logstash http input to be able to read snappy compressed
data.

Modifications:
To allow the HttpContentDecoder to support snappy it created a new
control flow to test for snappy content encoding.

If it is present, we are using a specific snappy decompressor to read
the data.

In order to make sure it was working I also included a e2e test on the
behaior of HttpContentDecoder.

Result:
We should be able to send snappy traffic to a server using
HttpContentDocder and be ale to uncompresse the traffic.

Co-authored-by: Aayush Atharva <hyperx.pro@outlook.com>

…ntDecompressor.java