Juniper driver - fix NETCONF discovery of JUNOS v19 devices regarding chassis-mac-addresses RPC

Added UT based on XML responses from v15 and v19 devices

Change-Id: Id4e0fe34b12dea6034e75f2276495282ea2e6aa2
diff --git a/drivers/juniper/src/test/resources/Junos_get-chassis-mac-addresses_response_19.2.xml b/drivers/juniper/src/test/resources/Junos_get-chassis-mac-addresses_response_19.2.xml
new file mode 100644
index 0000000..1cf0c4d
--- /dev/null
+++ b/drivers/juniper/src/test/resources/Junos_get-chassis-mac-addresses_response_19.2.xml
@@ -0,0 +1,10 @@
+<rpc-reply xmlns:junos="http://xml.juniper.net/junos/19.2I0/junos" xmlns="urn:ietf:params:xml:ns:netconf:base:1.0" message-id="1">
+    <chassis-mac-addresses>
+        <mac-address-information>
+            <public-base-address>f4:b5:2f:1f:81:00</public-base-address>
+            <public-count>192</public-count>
+            <private-base-address>f4:b5:2f:1f:81:c0</private-base-address>
+            <private-count>1088</private-count>
+        </mac-address-information>
+    </chassis-mac-addresses>
+</rpc-reply>
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