improve parser by skipping all lines containing a '{' or a '}'. fix unecessary []byte cast (linter issue).

builder/vmware/common/driver.go

@@ -462,7 +462,7 @@ func (d *VmwareDriver) PotentialGuestIP(state multistep.StateBag) ([]string, err
 			available_lease_entries := make([]appleDhcpLeaseEntry, 0)
 			for _, entry := range leaseEntries {
 				// Next check for any where the hardware address matches.
-				if bytes.Equal(hwaddr, []byte(entry.hwAddress)) {
+				if bytes.Equal(hwaddr, entry.hwAddress) {
 					available_lease_entries = append(available_lease_entries, entry)
 				}
 			}

builder/vmware/common/driver_parser.go

@@ -2462,7 +2462,7 @@ func readAppleDhcpdLeaseEntry(in chan byte) (entry *appleDhcpLeaseEntry, err err
 		if !ok {
 			insideBraces = false
 		}
-		if item_s == "{" || item_s == "}" {
+		if strings.Contains(item_s, "{") || strings.Contains(item_s, "}") {
 			continue
 		}
 		splittedLine := strings.Split(item_s, "=")