[task scheduler] Move files from build_scheduler/ to task_scheduler/

build_scheduler/go/task_scheduler/task_candidate_test.go

-package task_scheduler
-
-import (
-        "testing"
-
-        "github.com/stretchr/testify/assert"
-)
-
-func TestTaskCandidateId(t *testing.T) {
-        t1 := makeTaskCandidate("task1", []string{"k:v"})
-        t1.Repo = "Myrepo"
-        t1.Revision = "abc123"
-        id1 := t1.MakeId()
-        repo1, name1, rev1, err := parseId(id1)
-        assert.NoError(t, err)
-        assert.Equal(t, t1.Repo, repo1)
-        assert.Equal(t, t1.Name, name1)
-        assert.Equal(t, t1.Revision, rev1)
-
-        badIds := []string{
-                "",
-                "taskCandidate|a|b|",
-                "20160831T000018.497703717Z_000000000000015b",
-        }
-        for _, id := range badIds {
-                _, _, _, err := parseId(id)
-                assert.Error(t, err)
-        }
-}