[LTP] [PATCH] rpc_lib.sh: fix portmapper detection in case of socket activation

[Nikita Yushchenko]

>> Just reproduced manually:
> 
>> [root@vz8 ~]# vzctl start 1000
>> Starting Container ...
>> ...
>> [root@vz8 ~]# vzctl enter 1000
>> entered into CT 1000
>> CT-1000 /# pidof rpcbind
>> CT-1000 /# rpcinfo > /dev/null 2>&1
>> CT-1000 /# pidof rpcbind
>> 678
>> CT-1000 /#
> 
> Thanks for info. I'm asking because if it's a setup bug it should not be hidden
> by workaround but reported. I suppose normal Centos8 VM works.

I's say this is starting service on demand and this is exactly what socket activation is designed for.