moved test cases file to testdata

plugin/ochttp/testdata/download-test-cases.sh

@@ -0,0 +1,5 @@
+# This script downloads latest test cases from specs
+
+# TODO: change the link to when test cases are merged to specs repo
+
+curl https://raw.githubusercontent.com/SergeyKanzhelev/opencensus-specs/sergkanz/tes-cases-for-http/trace/http-out-test-cases.json -o http-out-test-cases.json

plugin/ochttp/http-out-test-cases.json → plugin/ochttp/testdata/http-out-test-cases.json

@@ -1,11 +1,11 @@
 [
     {
-      "name": "Successfull GET call to https://example.com",
+      "name": "Successful GET call to https://example.com",
       "method": "GET",
       "url": "https://example.com/",
       "spanName": "/",
       "spanStatus": "OK",
-      "spanKind":  "Client",
+      "spanKind": "Client",
       "spanAttributes": {
         "http.path": "/",
         "http.method": "GET",

plugin/ochttp/trace_test.go

@@ -535,7 +535,7 @@ func TestAgainstSpecs(t *testing.T) {
 
 	fmt.Println("start")
 
-	dat, err := ioutil.ReadFile("http-out-test-cases.json")
+	dat, err := ioutil.ReadFile("testdata/http-out-test-cases.json")
 	if err != nil {
 		t.Fatalf("error reading file: %v", err)
 	}