[docker-frr]: bring quagga docker features to frr docker

[lguohan]

• use superviord to manage process in frr docker
• intro separated configuration mode for frr
• bring quagga configuration template to frr.

- What I did

- How I did it

- How to verify it
build the image and tested the vs image for both integrated mode and separated mode.

- Description for the changelog

vlab-01# show bgp sum

IPv4 Unicast Summary:
BGP router identifier 10.1.0.32, local AS number 65100 vrf-id 0
BGP table version 12760
RIB entries 12807, using 2001 KiB of memory
Peers 8, using 164 KiB of memory
Peer groups 2, using 128 bytes of memory

Neighbor        V         AS MsgRcvd MsgSent   TblVer  InQ OutQ  Up/Down State/PfxRcd
10.0.0.57       4      64600    3309    4372        0    0    0 00:05:15         6400
10.0.0.59       4      64600    3307    4373        0    0    0 00:05:15         6400
10.0.0.61       4      64600    3305    4373        0    0    0 00:05:15         6400
10.0.0.63       4      64600    3307    4372        0    0    0 00:05:15         6400

Total number of neighbors 4

IPv6 Unicast Summary:
BGP router identifier 10.1.0.32, local AS number 65100 vrf-id 0
BGP table version 12634
RIB entries 12805, using 2001 KiB of memory
Peers 8, using 164 KiB of memory
Peer groups 2, using 128 bytes of memory

Neighbor        V         AS MsgRcvd MsgSent   TblVer  InQ OutQ  Up/Down State/PfxRcd
fc00::72        4      64600    3306    5208        0    0    0 00:05:15         6400
fc00::76        4      64600    3301    5208        0    0    0 00:05:15         6400
fc00::7a        4      64600    3305    5208        0    0    0 00:05:15         6400
fc00::7e        4      64600    3306    5208        0    0    0 00:05:15         6400

Total number of neighbors 4

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