Change the fullcommand parameter to full_command for keepalived::vrrp::track_process

[fduranti]

Pull Request (PR) description

This change the parameter fullcommand to full_command for keepalived::vrrp::track_process
Extracted from the manual page of keepalived.conf (2.0.14) : http://www.keepalived.org/manpage.html

           vrrp_track_process <STRING> {
               # process to monitor
               process <QUOTED_STRING>

               # default weight (default is 1)
               weight <-254..254>

               # minimum number of processes for success
               quorum NUM
  
               # time to delay after process quorum lost before
               #   consider process failed (in fractions of second)
               delay SECS

               # Normally process string is matched against the process name,
               #   as shown on the Name: line in /proc/PID/status.
               #   This option matches the full command line
               full_command
           }

This Pull Request (PR) fixes the following issues

Fixes #179