Fix compilation error of YamlCodec in jdk1.8

[oxsean]

What is the purpose of the change

Fix compilation error of: no suitable method found for loadAs(String,Class<CAP#1>)

[ERROR] dubbo\dubbo-remoting\dubbo-remoting-http12\src\main\java\org\apache\dubbo\remoting\http12\message\codec\YamlCodec.java:[64,41] error: no suitable method found for loadAs(String,Class<CAP#1>)
[ERROR]     method Yaml.<T#1>loadAs(Reader,Class<? super T#1>) is not applicable
[ERROR]       (cannot infer type-variable(s) T#1
[ERROR]         (argument mismatch; String cannot be converted to Reader))
[ERROR]     method Yaml.<T#2>loadAs(String,Class<? super T#2>) is not applicable
[ERROR]       (cannot infer type-variable(s) T#2
[ERROR]         (argument mismatch; Class<CAP#1> cannot be converted to Class<? super T#2>))
[ERROR]     method Yaml.<T#3>loadAs(InputStream,Class<? super T#3>) is not applicable
[ERROR]       (cannot infer type-variable(s) T#3
[ERROR]         (argument mismatch; String cannot be converted to InputStream))
[ERROR]   where T#1,T#2,T#3 are type-variables:
[ERROR]     T#1 extends Object declared in method <T#1>loadAs(Reader,Class<? super T#1>)
[ERROR]     T#2 extends Object declared in method <T#2>loadAs(String,Class<? super T#2>)
[ERROR]     T#3 extends Object declared in method <T#3>loadAs(InputStream,Class<? super T#3>)
[ERROR]   where CAP#1 is a fresh type-variable:
[ERROR]     CAP#1 extends Object from capture of ?

[sonarcloud]

Quality Gate passed

Issues
0 New issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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