Modify fast-reboot script to use teamd service script

[vaibhavhd]

- What I did
A new teamd service script has been added in sonic-buildimage as part of the PR - sonic-net/sonic-buildimage#5163

With this change, fast-reboot script will now use the new teamd script to handle killing teamd docker in both fast-boot and warm-boot mode.

- How I did it
Replaced the existing teamd docker handling with the systemctl stop teamd.

- How to verify it
Tested the locally modified script in a DUT for warm-reboot and fast-reboot:

warm-reboot teamd shutdown path:

Nov 19 23:15:01.073902 str-7260cx3-acs-7 NOTICE admin: Stopping teamd ...
Nov 19 23:15:01.080848 str-7260cx3-acs-7 INFO systemd[1]: Stopping TEAMD container...
Nov 19 23:15:01.086341 str-7260cx3-acs-7 NOTICE admin: Stopping teamd service...
Nov 19 23:15:01.278733 str-7260cx3-acs-7 NOTICE admin: Warm boot flag: teamd true.
Nov 19 23:15:01.284320 str-7260cx3-acs-7 NOTICE admin: Fast boot flag: teamd false.
Nov 19 23:15:01.434833 str-7260cx3-acs-7 INFO teamd#supervisor-proc-exit-listener: Process tlm_teamd exited unxepectedly. Terminating supervisor...
Nov 19 23:15:02.435935 str-7260cx3-acs-7 NOTICE teamd#teamsyncd: :- cleanTeamSync: Cleaning up LAG teamd resources ...
Nov 19 23:15:02.437795 str-7260cx3-acs-7 NOTICE teamd#teamsyncd: :- main: Received SIGTERM Exiting
Nov 19 23:15:04.442791 str-7260cx3-acs-7 NOTICE teamd#teammgrd: :- cleanTeamProcesses: Cleaning up LAGs during shutdown...
Nov 19 23:15:04.448515 str-7260cx3-acs-7 INFO teamd#supervisord: teammgrd Daemon not running
Nov 19 23:15:04.449084 str-7260cx3-acs-7 ERR teamd#teammgrd: :- main: Runtime error: /usr/bin/teamd -k -t "PortChannel0001" :
Nov 19 23:15:05.602317 str-7260cx3-acs-7 INFO containerd[522]: time="2020-11-19T23:15:05.601120455Z" level=info msg="shim reaped" id=db0414c94fd3a8ad150850d0e528644ba842c3c2b818cb4b21d3b53aac281d54
Nov 19 23:15:05.611856 str-7260cx3-acs-7 INFO dockerd[639]: time="2020-11-19T23:15:05.610844787Z" level=info msg="ignoring event" module=libcontainerd namespace=moby topic=/tasks/delete type="*events.TaskDelete"
Nov 19 23:15:05.627398 str-7260cx3-acs-7 INFO systemd[1]: var-lib-docker-containers-db0414c94fd3a8ad150850d0e528644ba842c3c2b818cb4b21d3b53aac281d54-mounts-shm.mount: Succeeded.
Nov 19 23:15:05.640344 str-7260cx3-acs-7 INFO systemd[1]: var-lib-docker-overlay2-daea42184e4b9e86cd4c1ed9e616d38378c199a77c432d571bdc5057724ae89a-merged.mount: Succeeded.
Nov 19 23:15:05.820798 str-7260cx3-acs-7 INFO teamd.sh[11184]: teamd
Nov 19 23:15:05.821947 str-7260cx3-acs-7 INFO teamd.sh[1926]: 0
Nov 19 23:15:05.827080 str-7260cx3-acs-7 NOTICE admin: Stopped teamd service...
Nov 19 23:15:05.830923 str-7260cx3-acs-7 INFO systemd[1]: teamd.service: Succeeded.
Nov 19 23:15:05.831685 str-7260cx3-acs-7 INFO systemd[1]: Stopped TEAMD container.
Nov 19 23:15:05.837243 str-7260cx3-acs-7 NOTICE admin: Stopped  teamd ...

fast-reboot teamd shutdown path:

Nov 19 23:34:36.180300 str-7260cx3-acs-7 NOTICE admin: Stopping teamd ...
Nov 19 23:34:36.186619 str-7260cx3-acs-7 INFO systemd[1]: Stopping TEAMD container...
Nov 19 23:34:36.192215 str-7260cx3-acs-7 NOTICE admin: Stopping teamd service...
Nov 19 23:34:36.414572 str-7260cx3-acs-7 NOTICE admin: Warm boot flag: teamd false.
Nov 19 23:34:36.421209 str-7260cx3-acs-7 NOTICE admin: Fast boot flag: teamd true.
Nov 19 23:34:36.597069 str-7260cx3-acs-7 INFO teamd#supervisor-proc-exit-listener: Process tlm_teamd exited unxepectedly. Terminating supervisor...
Nov 19 23:34:36.906270 str-7260cx3-acs-7 INFO containerd[485]: time="2020-11-19T23:34:36.906148279Z" level=info msg="shim reaped" id=db0414c94fd3a8ad150850d0e528644ba842c3c2b818cb4b21d3b53aac281d54
Nov 19 23:34:36.916315 str-7260cx3-acs-7 INFO dockerd[649]: time="2020-11-19T23:34:36.916203497Z" level=info msg="ignoring event" module=libcontainerd namespace=moby topic=/tasks/delete type="*events.TaskDelete"
Nov 19 23:34:36.933087 str-7260cx3-acs-7 INFO systemd[1]: var-lib-docker-containers-db0414c94fd3a8ad150850d0e528644ba842c3c2b818cb4b21d3b53aac281d54-mounts-shm.mount: Succeeded.
Nov 19 23:34:36.962163 str-7260cx3-acs-7 INFO systemd[1]: var-lib-docker-overlay2-daea42184e4b9e86cd4c1ed9e616d38378c199a77c432d571bdc5057724ae89a-merged.mount: Succeeded.
Nov 19 23:34:37.011012 str-7260cx3-acs-7 INFO teamd.sh[1977]: 137
Nov 19 23:34:37.064579 str-7260cx3-acs-7 INFO teamd.sh[10294]: teamd
Nov 19 23:34:37.069420 str-7260cx3-acs-7 NOTICE admin: Stopped teamd service...
Nov 19 23:34:37.073007 str-7260cx3-acs-7 INFO systemd[1]: teamd.service: Succeeded.
Nov 19 23:34:37.075058 str-7260cx3-acs-7 INFO systemd[1]: Stopped TEAMD container.
Nov 19 23:34:37.082920 str-7260cx3-acs-7 NOTICE admin: Stopped teamd ...

- Previous command output (if the output of a command-line utility has changed)

- New command output (if the output of a command-line utility has changed)

[vaibhavhd]

Retest this please

[vaibhavhd]

Retest this please

[vaibhavhd]

Retest this please

[vaibhavhd]

Retest this please

[vaibhavhd]

Retest this please

[vaibhavhd]

Retest this please