Rename devices to <area>-<role> scheme

DC fabric: spine/leaf/border-leaf/access/host -> dc-spine, dc-leaf,
dc-border-leaf, dc-access, dc-server. Campus border leafs flipped
from border-leaf-campus to campus-border-leaf for consistency. Core,
campus spines/leafs/access/hosts unchanged.

Updates topology, annotations, all configs (hostnames + peer
descriptions), host interface files, README, TROUBLESHOOTING,
END_TO_END_TESTING, and the SVG diagram.

hosts/dc-server4_interfaces

@@ -0,0 +1,19 @@
+auto lo
+iface lo inet loopback
+
+auto bond0
+iface bond0 inet manual
+    use bond
+    bond-slaves eth1 eth2
+    bond-mode 802.3ad
+    bond-miimon 100
+    bond-lacp-rate fast
+    up ip link set $IFACE up
+
+auto bond0.78
+iface bond0.78 inet static
+    address 10.78.78.104
+    netmask 255.255.255.0
+    gateway 10.78.78.1
+    vlan-raw-device bond0
+    up ip link set $IFACE up