re organize tests and extraction into multiple files (#432)

Author: duncanista

src/trace/constants.ts

@@ -1,28 +1,4 @@
-export enum SampleMode {
-  USER_REJECT = -1,
-  AUTO_REJECT = 0,
-  AUTO_KEEP = 1,
-  USER_KEEP = 2,
-}
-export enum Source {
-  Xray = "xray",
-  Event = "event",
-  DDTrace = "ddtrace",
-}
-
-export const traceIDHeader = "x-datadog-trace-id";
-export const parentIDHeader = "x-datadog-parent-id";
-export const samplingPriorityHeader = "x-datadog-sampling-priority";
-export const xraySubsegmentName = "datadog-metadata";
-export const xraySubsegmentKey = "trace";
-export const xrayBaggageSubsegmentKey = "root_span_metadata";
-export const xrayLambdaFunctionTagsKey = "lambda_function_tags";
-export const xraySubsegmentNamespace = "datadog";
-export const xrayTraceEnvVar = "_X_AMZN_TRACE_ID";
-export const awsXrayDaemonAddressEnvVar = "AWS_XRAY_DAEMON_ADDRESS";
 export const ddtraceVersion = "X.X.X";
 export const apiGatewayEventV2 = "2.0";
 export const parentSpanFinishTimeHeader = "x-datadog-parent-span-finish-time";
-export const authorizingRequestIdHeader = "x-datadog-authorizing-requestid";
-
 export const DD_SERVICE_ENV_VAR = "DD_SERVICE";