tests: create wpipc tests sockets also in /tmp with a random name

See #39, #16
7 jobs for gkiagia/testsockets in 1 minute and 29 seconds (queued for 3 seconds)
Status Name Job ID Coverage
  Container
passed container_fedora #11478564

00:00:20

passed container_ubuntu #11478565

00:00:22

 
  Build
passed build_on_fedora_no_docs #11478567

00:00:57

passed build_on_fedora_with_docs #11478566

00:01:07

passed build_on_fedora_wpipc #11478568

00:00:46

passed build_on_ubuntu_no_gir #11478570

00:00:48

passed build_on_ubuntu_with_gir #11478569

00:01:00