Fix failing tests

Signed-off-by: Ayan Sinha Mahapatra <ayansmahapatra@gmail.com>

Author: AyanSinhaMahapatra

tests/scancode/data/composer/composer.expected.json

@@ -11,6 +11,7 @@
       "output_format_version": "2.0.0",
       "message": null,
       "errors": [],
+      "warnings": [],
       "extra_data": {
         "spdx_license_list_version": "3.16",
         "files_count": 1
@@ -155,7 +156,7 @@
       "code_view_url": null,
       "vcs_url": null,
       "copyright": null,
-      "license_expression": null,
+      "license_expression": "mit",
       "declared_license": "MIT",
       "notice_text": null,
       "source_packages": [],
@@ -209,7 +210,7 @@
           "code_view_url": null,
           "vcs_url": null,
           "copyright": null,
-          "license_expression": null,
+          "license_expression": "mit",
           "declared_license": "MIT",
           "notice_text": null,
           "source_packages": [],