Backport container scanning fixtures

Fix JSON formating and indent

spec/fixtures/security-reports/feature-branch/gl-container-scanning-report.json

 {
-    "image": "registry.gitlab.com/bikebilly/auto-devops-10-6/feature-branch:e7315ba964febb11bac8f5cd6ec433db8a3a1583",
-    "unapproved": [
-        "CVE-2017-15650"
-    ],
-    "vulnerabilities": [
-        {
-            "featurename": "musl",
-            "featureversion": "1.1.14-r15",
-            "vulnerability": "CVE-2017-15650",
-            "namespace": "alpine:v3.4",
-            "description": "",
-            "link": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-15650",
-            "severity": "Medium",
-            "fixedby": "1.1.14-r16"
-        }
-    ]
+  "image": "registry.gitlab.com/bikebilly/auto-devops-10-6/feature-branch:e7315ba964febb11bac8f5cd6ec433db8a3a1583",
+  "unapproved": ["CVE-2017-15650"],
+  "vulnerabilities": [
+    {
+      "featurename": "musl",
+      "featureversion": "1.1.14-r15",
+      "vulnerability": "CVE-2017-15650",
+      "namespace": "alpine:v3.4",
+      "description": "",
+      "link": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-15650",
+      "severity": "Medium",
+      "fixedby": "1.1.14-r16"
+    }
+  ]
 }