The value of tBgpPrngPlcyLocalAddress specifies
the address of the peer group local address.
The type of address contained in tBgpPrngPlcyLocalAddress
is determined by tBgpPrngPlcyLocalAddressType.
If local address is not set, tBgpPrngPlcyLocalAddressType
is set to unknown and tBgpPrngPlcyLocalAddress returns
a null string.