allow for non-ec2 clients to use ec2 query protocol generator

Author: sbiscigl

tools/code-generation/generator/src/main/java/com/amazonaws/util/awsclientgenerator/config/ServiceGeneratorConfig.java

@@ -46,6 +46,7 @@ public class ServiceGeneratorConfig {
             LANGUAGE_PROTOCOL_DEFAULT_MAPPING.put("cpp-rest-xml", new RestXmlCppClientGenerator());
             LANGUAGE_PROTOCOL_DEFAULT_MAPPING.put("cpp-query", new QueryCppClientGenerator());
             LANGUAGE_PROTOCOL_DEFAULT_MAPPING.put("cpp-smithy-rpc-v2-cbor", new CborCppClientGenerator());
+            LANGUAGE_PROTOCOL_DEFAULT_MAPPING.put("cpp-ec2", new Ec2CppClientGenerator());
         } catch (Exception e) {
             e.printStackTrace();
         }