fix 802.1Q config reader on Huawei VRP 8

The output format of command 'display vlan summary' varies depending on
the number of VLANs in system. It does not show the VLAN list in case
there are many of them.

So vrp85Read8021QConfig has turned to parse the running config output
(lines "vlan batch ...") to collect VLAN ids.

vrp85TranslatePushQueue: do not execute useless "display vlan summary"

iosParseVLANString: always return int values. Before there were
ints/strings mixed (single items were strings, range items were ints).

Thus the vlan list became empty.