fix test files

.script/tests/workbooksValidatorTest/missingBlackPreviewImageWorkbooksMetadata.json

@@ -2,7 +2,7 @@
   {
     "workbookKey": "onlyWhitePreviewImagesWorkbook",
     "logoFileName": "some_logo.svg",
-    "description": "This is another valid test workbook",
+    "description": "This is a test workbook with only white preview image filenames",
     "dataTypesDependencies": [ "CommonSecurityLog", "SecurityEvent", "Syslog"],
     "dataConnectorsDependencies": [ "SomeConnector", "SomeOtherConnector"  ],
     "previewImagesFileNames": [ "Image1White.png", "Image2White.png" ],

.script/tests/workbooksValidatorTest/missingRequiredPropertyWorkbooksMetadata.json

@@ -1,7 +1,7 @@
 [
   {
     "logoFileName": "some_logo.svg",
-    "description": "This is a test workbook with a missing required field",
+    "description": "This is a test workbook with a missing required property (workbookKey)",
     "dataTypesDependencies": [ "CommonSecurityLog"],
     "dataConnectorsDependencies": [ ],
     "previewImagesFileNames": [ "SomeImageWhite.png", "SomeImageBlack.png" ],

.script/tests/workbooksValidatorTest/missingWhitePreviewImageWorkbooksMetadata.json

@@ -2,7 +2,7 @@
   {
     "workbookKey": "onlyBlackPreviewImagesWorkbook",
     "logoFileName": "some_logo.svg",
-    "description": "This is another valid test workbook",
+    "description": "This is a test workbook with only black preview image filenames",
     "dataTypesDependencies": [ "CommonSecurityLog", "SecurityEvent", "Syslog"],
     "dataConnectorsDependencies": [ "SomeConnector", "SomeOtherConnector"  ],
     "previewImagesFileNames": [ "Image1Black.png", "Image2Black.png" ],

.script/tests/workbooksValidatorTest/noColorPreviewImagesWorkbooksMetadata.json

@@ -2,7 +2,7 @@
     {
       "workbookKey": "MyTestWorkbook",
       "logoFileName": "some_logo.svg",
-      "description": "This is a test workbook",
+      "description": "This is a test workbook with an invalid preview image (no color)",
       "dataTypesDependencies": [ "CommonSecurityLog"],
       "dataConnectorsDependencies": [ ],
       "previewImagesFileNames": [ "SomeImage.png" ],

.script/tests/workbooksValidatorTest/nonPngPreviewImagesWorkbooksMetadata.json

@@ -2,7 +2,7 @@
     {
       "workbookKey": "MyTestWorkbook",
       "logoFileName": "some_logo.svg",
-      "description": "This is a test workbook",
+      "description": "This is an invalid workbook with a non PNG preview image",
       "dataTypesDependencies": [ "CommonSecurityLog"],
       "dataConnectorsDependencies": [ ],
       "previewImagesFileNames": [ "SomeImage-Black.jpeg" ],