Comms: add http client common utilities and minor fixes

comms/httpClient.go

@@ -0,0 +1,22 @@
+package comms
+
+import (
+	"io"
+	"net/http"
+)
+
+type HttpClient struct {
+	Client *http.Client
+}
+
+func NewHttpClient(client *http.Client) *HttpClient {
+	return &HttpClient{Client: client}
+}
+
+func (httpClient *HttpClient) GetRequest(method string, url string, body io.Reader) (*http.Request, error) {
+	return http.NewRequest(method, url, body)
+}
+
+func (httpClient *HttpClient) DoRequest(r *http.Request) (*http.Response, error) {
+	return httpClient.Client.Do(r)
+}