Fix call object memory leak in ruby, when call object is closed
Fix call object memory leak in ruby, when call object is closed

donnadionne/grpc,ncteisen/grpc,nicolasnoble/grpc,stanley-cheung/grpc,sreecha/grpc,mehrdada/grpc,vjpai/grpc,Vizerai/grpc,nicolasnoble/grpc,mehrdada/grpc,deepaklukose/grpc,PeterFaiman/ruby-grpc-minimal,jtattermusch/grpc,pszemus/grpc,murgatroid99/grpc,ctiller/grpc,thinkerou/grpc,chrisdunelm/grpc,stanley-cheung/grpc,ctiller/grpc,ncteisen/grpc,thinkerou/grpc,sreecha/grpc,dgquintas/grpc,nicolasnoble/grpc,muxi/grpc,Vizerai/grpc,ejona86/grpc,thinkerou/grpc,firebase/grpc,firebase/grpc,ncteisen/grpc,simonkuang/grpc,jtattermusch/grpc,dgquintas/grpc,ctiller/grpc,ejona86/grpc,deepaklukose/grpc,fuchsia-mirror/third_party-grpc,geffzhang/grpc,jboeuf/grpc,grpc/grpc,ejona86/grpc,mehrdada/grpc,pszemus/grpc,pszemus/grpc,thinkerou/grpc,mehrdada/grpc,chrisdunelm/grpc,fuchsia-mirror/third_party-grpc,muxi/grpc,adelez/grpc,firebase/grpc,thinkerou/grpc,Vizerai/grpc,simonkuang/grpc,murgatroid99/grpc,deepaklukose/grpc,donnadionne/grpc,murgatroid99/grpc,muxi/grpc,daniel-j-born/grpc,kpayson64/grpc,kpayson64/grpc,stanley-cheung/grpc,sreecha/grpc,sreecha/grpc,jboeuf/grpc,ncteisen/grpc,PeterFaiman/ruby-grpc-minimal,ejona86/grpc,PeterFaiman/ruby-grpc-minimal,jtattermusch/grpc,kpayson64/grpc,dgquintas/grpc,ejona86/grpc,simonkuang/grpc,nicolasnoble/grpc,kpayson64/grpc,adelez/grpc,PeterFaiman/ruby-grpc-minimal,sreecha/grpc,adelez/grpc,ncteisen/grpc,carl-mastrangelo/grpc,geffzhang/grpc,nicolasnoble/grpc,carl-mastrangelo/grpc,simonkuang/grpc,jtattermusch/grpc,jtattermusch/grpc,pszemus/grpc,daniel-j-born/grpc,donnadionne/grpc,vjpai/grpc,Vizerai/grpc,daniel-j-born/grpc,fuchsia-mirror/third_party-grpc,pszemus/grpc,ejona86/grpc,ncteisen/grpc,jboeuf/grpc,ejona86/grpc,carl-mastrangelo/grpc,chrisdunelm/grpc,fuchsia-mirror/third_party-grpc,dgquintas/grpc,donnadionne/grpc,carl-mastrangelo/grpc,Vizerai/grpc,deepaklukose/grpc,dgquintas/grpc,carl-mastrangelo/grpc,vjpai/grpc,nicolasnoble/grpc,firebase/grpc,sreecha/grpc,dgquintas/grpc,jtattermusch/grpc,ctiller/grpc,pszemus/grpc,stanley-cheung/grpc,daniel-j-born/grpc,thinkerou/grpc,thinkerou/grpc,chrisdunelm/grpc,sreecha/grpc,fuchsia-mirror/third_party-grpc,muxi/grpc,dgquintas/grpc,simonkuang/grpc,deepaklukose/grpc,murgatroid99/grpc,vjpai/grpc,geffzhang/grpc,fuchsia-mirror/third_party-grpc,chrisdunelm/grpc,pszemus/grpc,nicolasnoble/grpc,pszemus/grpc,ctiller/grpc,daniel-j-born/grpc,vjpai/grpc,Vizerai/grpc,simonkuang/grpc,kpayson64/grpc,kpayson64/grpc,muxi/grpc,thinkerou/grpc,simonkuang/grpc,donnadionne/grpc,vjpai/grpc,grpc/grpc,kpayson64/grpc,sreecha/grpc,chrisdunelm/grpc,donnadionne/grpc,ctiller/grpc,firebase/grpc,vjpai/grpc,jboeuf/grpc,muxi/grpc,nicolasnoble/grpc,fuchsia-mirror/third_party-grpc,stanley-cheung/grpc,ncteisen/grpc,muxi/grpc,deepaklukose/grpc,adelez/grpc,daniel-j-born/grpc,chrisdunelm/grpc,stanley-cheung/grpc,pszemus/grpc,chrisdunelm/grpc,carl-mastrangelo/grpc,vjpai/grpc,sreecha/grpc,firebase/grpc,muxi/grpc,ctiller/grpc,donnadionne/grpc,jtattermusch/grpc,jtattermusch/grpc,stanley-cheung/grpc,firebase/grpc,geffzhang/grpc,ctiller/grpc,stanley-cheung/grpc,jboeuf/grpc,murgatroid99/grpc,adelez/grpc,thinkerou/grpc,murgatroid99/grpc,vjpai/grpc,mehrdada/grpc,geffzhang/grpc,daniel-j-born/grpc,thinkerou/grpc,fuchsia-mirror/third_party-grpc,stanley-cheung/grpc,ncteisen/grpc,murgatroid99/grpc,adelez/grpc,ncteisen/grpc,donnadionne/grpc,jboeuf/grpc,kpayson64/grpc,donnadionne/grpc,stanley-cheung/grpc,grpc/grpc,grpc/grpc,mehrdada/grpc,murgatroid99/grpc,chrisdunelm/grpc,simonkuang/grpc,firebase/grpc,muxi/grpc,ncteisen/grpc,geffzhang/grpc,dgquintas/grpc,stanley-cheung/grpc,jboeuf/grpc,nicolasnoble/grpc,deepaklukose/grpc,firebase/grpc,dgquintas/grpc,thinkerou/grpc,pszemus/grpc,grpc/grpc,sreecha/grpc,kpayson64/grpc,grpc/grpc,murgatroid99/grpc,Vizerai/grpc,vjpai/grpc,grpc/grpc,simonkuang/grpc,jboeuf/grpc,pszemus/grpc,grpc/grpc,daniel-j-born/grpc,geffzhang/grpc,jtattermusch/grpc,chrisdunelm/grpc,mehrdada/grpc,carl-mastrangelo/grpc,nicolasnoble/grpc,carl-mastrangelo/grpc,dgquintas/grpc,muxi/grpc,donnadionne/grpc,ctiller/grpc,jtattermusch/grpc,muxi/grpc,grpc/grpc,Vizerai/grpc,sreecha/grpc,kpayson64/grpc,ctiller/grpc,carl-mastrangelo/grpc,adelez/grpc,Vizerai/grpc,PeterFaiman/ruby-grpc-minimal,deepaklukose/grpc,ctiller/grpc,Vizerai/grpc,ctiller/grpc,ejona86/grpc,jtattermusch/grpc,mehrdada/grpc,muxi/grpc,mehrdada/grpc,Vizerai/grpc,adelez/grpc,firebase/grpc,donnadionne/grpc,nicolasnoble/grpc,dgquintas/grpc,thinkerou/grpc,PeterFaiman/ruby-grpc-minimal,carl-mastrangelo/grpc,kpayson64/grpc,jtattermusch/grpc,firebase/grpc,mehrdada/grpc,jboeuf/grpc,geffzhang/grpc,murgatroid99/grpc,grpc/grpc,jboeuf/grpc,sreecha/grpc,grpc/grpc,ejona86/grpc,deepaklukose/grpc,fuchsia-mirror/third_party-grpc,mehrdada/grpc,jboeuf/grpc,fuchsia-mirror/third_party-grpc,carl-mastrangelo/grpc,carl-mastrangelo/grpc,ncteisen/grpc,stanley-cheung/grpc,ejona86/grpc,ejona86/grpc,pszemus/grpc,ncteisen/grpc,PeterFaiman/ruby-grpc-minimal,ejona86/grpc,vjpai/grpc,PeterFaiman/ruby-grpc-minimal,geffzhang/grpc,grpc/grpc,PeterFaiman/ruby-grpc-minimal,PeterFaiman/ruby-grpc-minimal,mehrdada/grpc,chrisdunelm/grpc,daniel-j-born/grpc,vjpai/grpc,jboeuf/grpc,adelez/grpc,nicolasnoble/grpc,firebase/grpc,donnadionne/grpc