Fix JSON files linter issues in test/vcpe

This is needed prior to adding job for JSON
files linting in CI.

Change-Id: I408107e0dc58648f833b8d585acf0e414882c7dc
Signed-off-by: Bartek Grzybowski <b.grzybowski@partner.samsung.com>
Issue-ID: INT-1451
diff --git a/test/vcpe/preload_templates/template.network.json b/test/vcpe/preload_templates/template.network.json
index 2acb9e3..e544ba7 100644
--- a/test/vcpe/preload_templates/template.network.json
+++ b/test/vcpe/preload_templates/template.network.json
@@ -31,7 +31,7 @@
           "VNF-API:dhcp-enabled": "N",
           "VNF-API:gateway-address": "${subnet_gateway}"
         }
-	]
+      ]
     },
     "VNF-API:sdnc-request-header": {
       "VNF-API:svc-action": "reserve",