get Docker container pid on core os

1. ci@gitvmd1:~$ sudo docker top ea105957eccf
UID                 PID                 PPID                C                   STIME               TTY                 TIME                CMD
80                  37288               37274               0                   Aug30               ?                   00:00:00            /bin/sh /opt/wildfly9/bin/standalone.sh -b 0.0.0.0 -bmanagement 0.0.0.0
80                  37382               37288               0                   Aug30               ?                   00:01:17            /usr/java/latest/bin/java -D[Standalone] -server -XX:+UseCompressedOops -server -XX:+UseCompressedOops -Xms64m -Xmx512m -XX:MaxPermSize=256m -Djava.net.preferIPv4Stack=true -Djboss.modules.system.pkgs=org.jboss.byteman -Djava.awt.headless=true -Dorg.jboss.boot.log.file=/opt/wildfly9/standalone/log/server.log -Dlogging.configuration=file:/opt/wildfly9/standalone/configuration/logging.properties -jar /opt/wildfly9/jboss-modules.jar -mp /opt/wildfly9/modules org.jboss.as.standalone -Djboss.home.dir=/opt/wildfly9 -Djboss.server.base.dir=/opt/wildfly9/standalone -b 0.0.0.0 -bmanagement 0.0.0.0

2. ci@gitvmd1:~$ docker inspect --format "{{ .State.Pid }}" ea105957eccf