fix rest leak bug

[leizhiyuan]

Motivation:

thanks https://github.com/sofastack/sofa-rpc/pull/593/files

拷贝了netty的inputstream来取消对netty的依赖

Explain the context, and why you're making that change.
To make others understand what is the problem you're trying to solve.

Modification:

Describe the idea and modifications you've done.

Result:

Fixes #.

If there is no issue then describe the changes introduced by this PR.

[leizhiyuan]

see #592

[codecov-io]

Codecov Report

Merging #731 into 5.5 will decrease coverage by 0.16%.
The diff coverage is 36.88%.

@@             Coverage Diff              @@
##                5.5     #731      +/-   ##
============================================
- Coverage     70.72%   70.55%   -0.17%     
- Complexity     1145     1148       +3     
============================================
  Files           382      386       +4     
  Lines         15903    16045     +142     
  Branches       2564     2587      +23     
============================================
+ Hits          11247    11321      +74     
- Misses         3316     3380      +64     
- Partials       1340     1344       +4

Impacted Files	Coverage Δ	Complexity Δ
...pay/sofa/rpc/server/rest/SofaNettyJaxrsServer.java	56.31% <100%> (ø)	0 <0> (ø)	⬇️
.../sofa/rpc/server/rest/NettyByteBufInputStream.java	23.07% <23.07%> (ø)	0 <0> (?)
...y/sofa/rpc/server/rest/SofaRestRequestHandler.java	51.61% <66.66%> (+0.76%)	0 <0> (ø)	⬇️
...pc/server/rest/SofaRestEasyHttpRequestDecoder.java	77.77% <77.77%> (ø)	0 <0> (?)
...pay/sofa/rpc/client/aft/InvocationStatFactory.java	82.92% <0%> (-2.08%)	15% <0%> (ø)
.../sofa/rpc/bootstrap/DefaultClientProxyInvoker.java	90.32% <0%> (-1.62%)	0% <0%> (ø)
...in/java/com/alipay/sofa/rpc/common/RpcConfigs.java	77.16% <0%> (-0.62%)	0% <0%> (ø)
...ava/com/alipay/sofa/rpc/test/HelloServiceImpl.java	92.3% <0%> (ø)	0% <0%> (?)
... and 10 more

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[ujjboy]

LGTM

[JervyShi]

LGTM