Add missing HEP Aruba Images (#2170)

* add missing images

device-types/HPE/Aruba-6100-12G-POE4-2SFPP.yaml

@@ -5,6 +5,8 @@ slug: hpe-aruba-6100-12g-poe4-2sfpp
 part_number: JL679A
 u_height: 1
 is_full_depth: false
+front_image: true
+rear_image: true
 console-ports:
   - name: usb-c
     type: usb-c

device-types/HPE/Aruba-IAP-315.yaml

@@ -5,6 +5,8 @@ slug: hpe-aruba-iap-315
 part_number: IAP-315
 u_height: 0
 is_full_depth: false
+front_image: true
+rear_image: false
 comments: '[Aruba 310 Series Datasheet](https://www.arubanetworks.com/assets/ds/DS_AP310Series.pdf)'
 console-ports:
   - name: Console

device-types/HPE/Aruba-IAP-515.yaml

@@ -5,6 +5,8 @@ slug: hpe-aruba-iap-515
 part_number: IAP-515
 u_height: 0
 is_full_depth: false
+front_image: true
+rear_image: true
 comments: '[Aruba 515 Series Datasheet](https://www.arubanetworks.com/assets/ds/DS_AP510Series.pdf)'
 console-ports:
   - name: Console