added IE-2000-8TC-B (#1439)

* added IE-2000-8TC-B

* weight added, no airflow, DC power input on box

* fixed new line requirement

* fixed trailing line

* added passive airflow

* added power ports

device-types/Cisco/IE-2000-8TC-B.yaml

+---
+manufacturer: Cisco
+model: IE-2000-8TC-B
+part_number: IE-2000-8TC-B
+slug: cisco-ie-2000-8tc-b
+u_height: 3
+is_full_depth: false
+weight: 2.75
+weight_unit: lb
+airflow: passive
+power-ports:
+  - name: DC-A
+    type: dc-terminal
+    maximum_draw: 18
+    allocated_draw: 14
+  - name: DC-B
+    type: dc-terminal
+    maximum_draw: 18
+    allocated_draw: 14
+interfaces:
+  - name: FastEthernet1/1
+    type: 100base-tx
+  - name: FastEthernet1/2
+    type: 100base-tx
+  - name: FastEthernet1/3
+    type: 100base-tx
+  - name: FastEthernet1/4
+    type: 100base-tx
+  - name: FastEthernet1/5
+    type: 100base-tx
+  - name: FastEthernet1/6
+    type: 100base-tx
+  - name: FastEthernet1/7
+    type: 100base-tx
+  - name: FastEthernet1/8
+    type: 100base-tx
+  - name: FastEthernet1/9
+    type: 100base-tx
+  - name: FastEthernet1/10
+    type: 100base-tx
+console-ports:
+  - name: con 0
+    type: rj-45
+  - name: usb
+    type: usb-mini-b