sort returned nameservers (#369)

The API isn't sorting the name servers so even when they match they
would report being different. This will prevent it trying to update them
every time

Signed-off-by: Amy Aronsohn <WagThatTail@Me.com>

providers/dnsimple/dnsimpleProvider.go

@@ -147,6 +147,7 @@ func (c *DnsimpleApi) GetRegistrarCorrections(dc *models.DomainConfig) ([]*model
 	if err != nil {
 		return nil, err
 	}
+  sort.Strings(nameServers)
 
 	actual := strings.Join(nameServers, ",")