ecp fix unintended retransmit of ecp messages

The rework of the ecp protocol introduced an unintended
retransmit of all ecp messages even when the ecp message
was acknowledged. The ecp message sequence number was not
stored in the vsi-profile data and remained zero.
vsi-profile data has been resend and acknowledged many times.

This caused no functional issue, but an increased traffic
between llpdad and switch.

With this patch the previous behavior is restored.

Signed-off-by: Thomas Richter <tmricht@linux.vnet.ibm.com>
Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
evb lower case comparison for EVB protocol parameters

The lldpad configuration file may store IEEE 802.1 Qbg parameters
(such as fmode and capabilities) in upper case letters.
When reading the configuration file the values a compared
against lower case strings and do not match.
The patch reads the configuration file values and uses
case in-sensitive comparisons.

Signed-off-by: Thomas Richter <tmricht@linux.vnet.ibm.com>
Signed-off-by: John Fastabend <john.r.fastabend@intel.com>