[FIX] use tftp_server_address from local config
[FIX] use tftp_server_address from local config

tftp_server_address was used from the config generated for the test
machine. This config does not contain the tftp_server_address because
the test machine does not need this info. Now the address is taken from
the local config.

tapper/Tapper-MCP,csdb/Tapper-MCP,csdb/Tapper-MCP,tapper/Tapper-MCP