ITS#7926 dynamic changes to olcListenerThreads

Reallocates sockets from old to new listener threads
3 jobs for its7926 in 29 minutes and 5 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
passed #1256
build-gnutls-mit

00:28:41

passed #1254
build-no-threads-no-slapd

00:02:57

passed #1255
build-openssl-heimdal

00:29:05