[Dubbo-2413] Fix StreamUtils resource leak

[biyuhao]

What is the purpose of the change

Fix StreamUtils resource leak

Brief changelog

Update StreamUtils.java
Update StreamUtilsTest.java

Verifying this change

UT passed

Fix #2413

[codecov-io]

Codecov Report

Merging #2414 into master will increase coverage by 0.25%.
The diff coverage is 100%.

@@             Coverage Diff              @@
##             master    #2414      +/-   ##
============================================
+ Coverage     54.84%   55.09%   +0.25%     
- Complexity     5238     5284      +46     
============================================
  Files           573      573              
  Lines         25455    25495      +40     
  Branches       4537     4540       +3     
============================================
+ Hits          13960    14046      +86     
+ Misses         9402     9348      -54     
- Partials       2093     2101       +8

Impacted Files	Coverage Δ	Complexity Δ
...n/java/org/apache/dubbo/common/io/StreamUtils.java	84.44% <100%> (+0.53%)	5 <0> (ø)	⬇️
...ache/dubbo/remoting/p2p/support/AbstractGroup.java	45.45% <0%> (-11.37%)	7% <0%> (-1%)
...org/apache/dubbo/rpc/filter/ActiveLimitFilter.java	83.33% <0%> (-5.56%)	6% <0%> (-1%)
...he/dubbo/remoting/transport/netty/NettyServer.java	67.85% <0%> (-3.58%)	8% <0%> (-1%)
...ava/org/apache/dubbo/config/ApplicationConfig.java	85.45% <0%> (-2.22%)	57% <0%> (+19%)
...pache/dubbo/registry/support/AbstractRegistry.java	67.41% <0%> (-1.88%)	62% <0%> (-1%)
...bo/remoting/transport/netty/NettyCodecAdapter.java	53.12% <0%> (-1.57%)	3% <0%> (ø)
...dubbo/remoting/exchange/support/DefaultFuture.java	44.96% <0%> (+0.67%)	25% <0%> (+1%)	⬆️
...apache/dubbo/rpc/protocol/dubbo/DubboProtocol.java	59.16% <0%> (+0.83%)	31% <0%> (+1%)	⬆️
...dubbo/rpc/protocol/dubbo/CallbackServiceCodec.java	78.67% <0%> (+1.47%)	29% <0%> (ø)	⬇️
... and 2 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update ff373a7...266c550. Read the comment docs.

[carryxyh]

Good job.
LGTM.