[Seastone] Changes the datatype of breakout_modes in platform.json for DPB

[samaity]

Signed-off-by: Sangita Maity sangitamaity0211@gmail.com

- What I did
Changed the datatype of breakout_modes in platform.json for DPB.
sonic-utilities#25 has a dependency on it.

- How I did it

- How to verify it

admin@lnos-x1-a-csw07:~$ sudo config interface breakout Ethernet0
1x100G[40G]  2x50G        4x25G[10G]
admin@lnos-x1-a-csw07:~$ sudo config interface breakout Ethernet0 2x50G -l -y

Running Breakout Mode : 1x100G[40G]
Target Breakout Mode : 2x50G

Ports to be deleted :
 {
    "Ethernet0": "100000"
}
Ports to be added :
 {
    "Ethernet2": "50000",
    "Ethernet0": "50000"
}

After running Logic to limit the impact

Final list of ports to be deleted :
 {
    "Ethernet0": "100000"
}
Final list of ports to be added :
 {
    "Ethernet2": "50000",
    "Ethernet0": "50000"
}
Loaded below Yang Models
['sonic-acl', 'sonic-extension', 'sonic-head', 'sonic-interface', 'sonic-loopback-interface', 'sonic-port', 'sonic-portchannel', 'sonic-vlan']
Reading data from Redis configDb

Start Port Deletion
Find dependecies for port Ethernet0
Dependecies Exist. No further action will be taken
*** Printing dependecies ***
/sonic-interface:sonic-interface/INTERFACE/INTERFACE_LIST[port_name='Ethernet0']/port_name
/sonic-interface:sonic-interface/INTERFACE/INTERFACE_IPPREFIX_LIST[port_name='Ethernet0'][ip-prefix='10.0.0.0/31']/port_name
/sonic-interface:sonic-interface/INTERFACE/INTERFACE_IPPREFIX_LIST[port_name='Ethernet0'][ip-prefix='2000:1:1::2/126']/port_name