2.2-SR Dhcp Relay

commit a7a6f4a4456f68d550883ec2b06958a58dcdc194 (HEAD -] onos-2.2, origin/onos-2.2)
Author: Seyeon Jeong [seyeon@opennetworking.org]
AuthorDate: Wed Feb 19 17:51:05 2020 -0800
Commit: Ray Milkey [ray@onlab.us]
CommitDate: Fri Feb 21 01:13:17 2020 +0000

Fix possible NPE when 't3-troubleshoot-pingall' command on a host without IP addr
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(cherry picked from commit 980eea4a63639bf082570c8bf9e882554921112a)

Case 1: DHCP v4 tests with 4 clients attached to switch directly and 1 server attached to switch directly, with 3 ONOS instances - PASS

• 1.1 Constructing test variables - PASS
• 1.2 Apply cell to environment - PASS
• 1.3 Uninstalling Atomix - PASS
• 1.4 Uninstalling ONOS package - PASS
• 1.5 Creating ONOS package - PASS
• 1.6 Installing Atomix - PASS
• 1.7 Installing ONOS package - PASS
• 1.8 Set up ONOS secure SSH - PASS
• 1.9 Checking ONOS service - PASS
• 1.10 Starting ONOS CLI sessions - PASS
• 1.11 Checking ONOS nodes - PASS
• 1.12 Checking ONOS applications - PASS
• 1.13 Starting Mininet Topology - PASS
• 1.14 Verify host IP address assignment in ONOS - PASS
• 1.15 Verify IP address assignment from hosts - PASS
• 1.16 Stopping Mininet - PASS
• 1.17 Copying karaf logs - PASS

Case 2: DHCP v4 tests with 4 clients attached to switch directly and 1 server attached to switch indirectly (via gateway), with 3 ONOS instances - FAIL