Fix generic invoke method name

[leizhiyuan]

Motivation:

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

Modification:

{"timestamp":"2019-09-19 08:16:05.659","tracerId":"1e27a7d51568852165656101897688","spanId":"0","span.kind":"client","local.app":"generic-client","protocol":"bolt","service":"com.alipay.sofa.rpc.invoke.generic.TestGenericService:1.0","method":"echoObj","current.thread.name":"main","invoke.type":"sync","router.record":"DIRECT","remote.app":"generic-server","remote.ip":"127.0.0.1:22222","local.client.ip":"127.0.0.1","result.code":"00","req.serialize.time":"0","resp.deserialize.time":"3","resp.size":"225","req.size":"1384","client.conn.time":"0","client.elapse.time":"3","local.client.port":"22222","baggage":""}

Result:

Fixes ##767

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

[ujjboy]

LGTM

[leizhiyuan]

{"timestamp":"2019-09-23 10:48:38.688","tracerId":"0a0ffb091569206918683101257027","spanId":"0","span.kind":"client","local.app":"generic-client","protocol":"bolt","service":"com.alipay.sofa.rpc.invoke.generic.TestGenericService:1.0","method":"echoObj","current.thread.name":"main","invoke.type":"sync","router.record":"DIRECT","remote.app":"generic-server","remote.ip":"127.0.0.1:22222","local.client.ip":"127.0.0.1","result.code":"00","req.serialize.time":"1","resp.deserialize.time":"4","resp.size":"225","req.size":"1384","client.conn.time":"0","client.elapse.time":"5","local.client.port":"22222","baggage":""}

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (5.5@7087c22). Click here to learn what that means.
The diff coverage is 75%.

@@          Coverage Diff          @@
##             5.5    #768   +/-   ##
=====================================
  Coverage       ?   70.7%           
  Complexity     ?    1144           
=====================================
  Files          ?     386           
  Lines          ?   16065           
  Branches       ?    2590           
=====================================
  Hits           ?   11359           
  Misses         ?    3347           
  Partials       ?    1359

Impacted Files	Coverage Δ	Complexity Δ
.../alipay/sofa/rpc/filter/ConsumerGenericFilter.java	82.69% <75%> (ø)	15 <0> (?)

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