textproc/kibana7: Fix restart and stop

Kibana now spawns two processes instead of one. The scenario looks like:

P1 /usr/sbin/daemon
P2 ${PREFIX}/bin/node ...
P3 ${PREFIX}/bin/node ...

It is not enough to kill P1 or P2, process P3 must be sent TERM signal.

Instruct process P3 to write its pid to a file specified by pid.file
config parameter.

Write P1's pid to /var/run/${name}-daemon.pid and instruct kibana to
write its the proper (P3) pid into /var/run/kibana.pid and also
check for proper process name.

And while here, also install a symlink for Node.js binary to
allow kibana utilities to work.