Add request/response payload of Redis to span data

[dxsup]

Description

• Add the fields request_payload and response_payload to the DataGroup in networkanalyzer.
• Add these fields to span in net_dict.

Motivation and Context

Now there is a field called "redis.command" which is enough for metrics. But for span data, users want to know which key the command is operating and what value it is. So the detailed information is added to the span data, which is named payload.

How Has This Been Tested?

go test -v network_analyzer_test.go network_analyzer.go config.go message_pair.go metric.go gauge_pool.go 

=== RUN   TestHttpProtocol
=== RUN   TestHttpProtocol/slowData
=== RUN   TestHttpProtocol/errorData
=== RUN   TestHttpProtocol/split
=== RUN   TestHttpProtocol/normal
--- PASS: TestHttpProtocol (0.01s)
    --- PASS: TestHttpProtocol/slowData (0.00s)
    --- PASS: TestHttpProtocol/errorData (0.00s)
    --- PASS: TestHttpProtocol/split (0.00s)
    --- PASS: TestHttpProtocol/normal (0.00s)
=== RUN   TestMySqlProtocol
=== RUN   TestMySqlProtocol/query-split
=== RUN   TestMySqlProtocol/query
--- PASS: TestMySqlProtocol (0.00s)
    --- PASS: TestMySqlProtocol/query-split (0.00s)
    --- PASS: TestMySqlProtocol/query (0.00s)
=== RUN   TestRedisProtocol
=== RUN   TestRedisProtocol/get
--- PASS: TestRedisProtocol (0.00s)
    --- PASS: TestRedisProtocol/get (0.00s)
=== RUN   TestDnsProtocol
=== RUN   TestDnsProtocol/multi
--- PASS: TestDnsProtocol (0.01s)
    --- PASS: TestDnsProtocol/multi (0.00s)
=== RUN   TestKafkaProtocol
=== RUN   TestKafkaProtocol/produce-split
=== RUN   TestKafkaProtocol/fetch-split
=== RUN   TestKafkaProtocol/fetch-one-topic-two-patitions
--- PASS: TestKafkaProtocol (0.01s)
    --- PASS: TestKafkaProtocol/produce-split (0.00s)
    --- PASS: TestKafkaProtocol/fetch-split (0.00s)
    --- PASS: TestKafkaProtocol/fetch-one-topic-two-patitions (0.00s)
=== RUN   TestDubboProtocol
=== RUN   TestDubboProtocol/shortData
--- PASS: TestDubboProtocol (0.00s)
    --- PASS: TestDubboProtocol/shortData (0.00s)
PASS
ok      command-line-arguments  0.071s