Add quota for the packets to tcp 169.254.169.254:80

Allow only 1M packets with destination tcp 169.254.169.254:80.
Any other protocols/ports or over 1M packets will be dropped.
Merge pull request #36 from hyunsun/UCLOUDNG-1506

Add quota for the packets to tcp 169.254.169.254:80
Add X-Tenant-ID to metadata request

Previously, one could update a port's device_id to be that of
another tenant's instance_id and then be able to retrieve that
instance's metadata. In order to prevent this X-Tenant-ID is now
passed in the metadata request to nova and nova then checks that
X-Tenant-ID also matches the tenant_id for the instance against it's
database to ensure it's not being spoofed.

DocImpact - When upgrading OpenStack nova and neturon, neutron
            should be updated first (and neutron-metadata-agent
            restarted before nova is upgraded) in order to minimize
            downtime. This is because there is also a patch to nova
            which has checks X-Tenant-ID against it's database
            therefore neutron-metadata-agent needs to pass that
            before nova is upgraded for metadata to work.

Change-Id: I2b8fa2f561a7f2914608e68133abf15efa95015a
Closes-Bug: #1235450
Merge pull request #37 from leeseuljeong/metadata_security_patch

Add X-Tenant-ID to metadata request
Revert "Add X-Tenant-ID to metadata request"
Merge pull request #38 from kt-cloudware/revert-37-metadata_security_patch

Revert "Add X-Tenant-ID to metadata request"