refactor: rename getBootstrapURL to discoverBootstrapURLs

this better reflects what function is doing.
and it separates from public `GetBootstrapURL` func

`discoverBootstrapURLs` retrieves URLs from dhcp lease file

In the next patches it will also fetch them from network manager

Signed-off-by: Boris Glimcher <Boris.Glimcher@emc.com>

sztp-agent/pkg/secureagent/daemon.go

@@ -57,7 +57,7 @@ func (a *Agent) RunCommandDaemon() error {
 func (a *Agent) performBootstrapSequence() error {
 	var err error
 	if a.GetBootstrapURL() == "" {
-		err = a.getBootstrapURL()
+		err = a.discoverBootstrapURLs()
 		if err != nil {
 			return err
 		}
@@ -90,7 +90,7 @@ func (a *Agent) performBootstrapSequence() error {
 	return nil
 }
 
-func (a *Agent) getBootstrapURL() error {
+func (a *Agent) discoverBootstrapURLs() error {
 	log.Println("[INFO] Get the Bootstrap URL from DHCP client")
 	var line string
 	if _, err := os.Stat(a.DhcpLeaseFile); err == nil {

sztp-agent/pkg/secureagent/daemon_test.go

@@ -31,7 +31,7 @@ const DHCPTestContent = `lease {
 }`
 
 //nolint:funlen
-func TestAgent_getBootstrapURL(t *testing.T) {
+func TestAgent_discoverBootstrapURLs(t *testing.T) {
 	dhcpTestFileOK := "/tmp/test.dhcp"
 	createTempTestFile(dhcpTestFileOK, DHCPTestContent, true)
 
@@ -95,7 +95,7 @@ func TestAgent_getBootstrapURL(t *testing.T) {
 				InputJSONContent:         tt.fields.InputJSONContent,
 				DhcpLeaseFile:            tt.fields.DhcpLeasesFile,
 			}
-			if err := a.getBootstrapURL(); (err != nil) != tt.wantErr {
+			if err := a.discoverBootstrapURLs(); (err != nil) != tt.wantErr {
 				t.Errorf("runDaemon() error = %v, wantErr %v", err, tt.wantErr)
 			}
 		})