Query filter for /secrets should use single quotes

Unlike other resources, when filtering secrets by
name, the name should be surrounded by single quotes.

If no quotes are present the following error is returned:

```
{"httpStatusCode":400,"errorCode":"HPE_GL_DATA_SERVICES_INVALID_PARAMETER","message":"unsupported OData filter \"name eq foo\" due to unsupported OData comparison value type (must be String)","debugId":"f461e8f8dc017a5fca7d6a6c404c0016"}
```

internal/datasources/secret/data_source.go

@@ -62,7 +62,7 @@ func (s *DataSource) Configure(
 }
 
 func createNameFilter(name string) string {
-	return constants.NameFilter + name
+	return constants.NameFilter + "'" + name + "'"
 }
 
 func getSecretByName(

internal/simulator/secret.go

@@ -18,15 +18,15 @@ func simulateSecretGetByName() {
 
 	gock.New("http://localhost").
 		Get("/data-services/v1beta1/secrets").
-		MatchParam("filter", "name eq "+secretName).
+		MatchParam("filter", "name eq "+ "'" + secretName + "'").
 		MatchHeader("Authorization", "Bearer abcdefghijklmnopqrstuvwxyz-0123456789").
 		Reply(200).
 		SetHeader("Content-Type", "application/json").
 		BodyString(secretByName)
 
 	gock.New("http://localhost").
 		Get("/data-services/v1beta1/secrets").
-		MatchParam("filter", "name eq "+secretName).
+		MatchParam("filter", "name eq "+ "'" + secretName + "'").
 		MatchHeader("Authorization", "Bearer expired-token").
 		Reply(401).
 		SetHeader("Content-Type", "text/plain").