Change default organization name to Default

bolt/organizations.go

@@ -18,7 +18,7 @@ var OrganizationsBucket = []byte("OrganizationsV1")
 
 // DefaultOrganizationID is the ID of the default organization.
 const DefaultOrganizationID uint64 = 0
-const DefaultOrganizationName string = "__default"
+const DefaultOrganizationName string = "Default"
 const DefaultOrganizationRole string = "member"
 
 // OrganizationsStore uses bolt to store and retrieve Organizations

bolt/organizations_test.go

@@ -184,8 +184,8 @@ func TestOrganizationsStore_All(t *testing.T) {
 			},
 			want: []chronograf.Organization{
 				{
-					Name:        "__default",
-					DefaultRole: "member",
+					Name:        bolt.DefaultOrganizationName,
+					DefaultRole: bolt.DefaultOrganizationRole,
 				},
 				{
 					Name: "EE - Evil Empire",