Block onHalfClose if onMessage was blocked

[jGleitz]

fixes #240

[codecov]

Codecov Report

Merging #241 (709affc) into master (f483d74) will increase coverage by 0.09%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##             master     #241      +/-   ##
============================================
+ Coverage     90.33%   90.43%   +0.09%     
- Complexity      212      213       +1     
============================================
  Files            38       38              
  Lines           921      930       +9     
  Branches         39       40       +1     
============================================
+ Hits            832      841       +9     
  Misses           69       69              
  Partials         20       20              

Impacted Files	Coverage Δ
.../springboot/grpc/security/SecurityInterceptor.java	96.00% <ø> (ø)
...ingboot/grpc/FailureHandlingServerInterceptor.java	100.00% <100.00%> (ø)
...ingboot/grpc/validation/ValidatingInterceptor.java	100.00% <100.00%> (ø)
...onfigure/metrics/GRpcMetricsAutoConfiguration.java	90.14% <0.00%> (-1.41%)	⬇️
...grpc/autoconfigure/consul/GrpcConsulRegistrar.java	93.02% <0.00%> (+2.32%)	⬆️

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[jvmlet]

Please make HalfCloseInterceptor abstract and don't register it as standalone interceptor

[jvmlet]

Looks great, thanks @jGleitz

[jvmlet]

Sorry, please discard my previous review .... Overlooked that HalfCloseInterceptor resides in test

Overlooked