Add RabbitMQ amqp-client dependency for test

[gaoran10]

Motivation

Currently, the "com.rabbitmq:amqp-client" dependency is from bookkeeper-stats, we should dependent it directly.

+- io.streamnative:managed-ledger:jar:3.0.0.1-SNAPSHOT:provided
|  +- org.apache.bookkeeper.stats:prometheus-metrics-provider:jar:4.15.3:provided
|  |  +- org.apache.bookkeeper.stats:bookkeeper-stats-api:jar:4.15.3:provided
|  |  \- io.prometheus:simpleclient_servlet:jar:0.16.0:provided
|  |     +- io.prometheus:simpleclient_common:jar:0.16.0:provided
|  |     \- io.prometheus:simpleclient_servlet_common:jar:0.16.0:provided
|  +- org.apache.bookkeeper.stats:codahale-metrics-provider:jar:4.15.3:provided
|  |  +- io.dropwizard.metrics:metrics-jmx:jar:4.1.12.1:provided
|  |  +- io.dropwizard.metrics:metrics-jvm:jar:4.1.12.1:provided
|  |  \- io.dropwizard.metrics:metrics-graphite:jar:4.1.12.1:provided
|  |     \- com.rabbitmq:amqp-client:jar:5.8.0:provided

Modifications

Add the "com.rabbitmq:amqp-client" dependency with test scope.

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