Ql4Ql: Add some more quality tag testcases.

Author: michaelnebel

ql/ql/test/queries/style/MissingQualityMetadata/MissingQualityMetadata.expected

@@ -2,3 +2,5 @@
 | testcases/BadQualityMultipleTopLevel.ql:1:1:11:3 | QueryDoc | This query file has incorrect top-level categorisation. It should have exactly one top-level category, either `@tags maintainability` or `@tags reliability`. |
 | testcases/BadQualityNoToplevel.ql:1:1:10:3 | QueryDoc | This query file has incorrect top-level categorisation. It should have exactly one top-level category, either `@tags maintainability` or `@tags reliability`. |
 | testcases/BadQualityReliabilityWrongToplevel.ql:1:1:11:3 | QueryDoc | This query file has a sub-category of maintainability but is missing the `@tags maintainability` tag. |
+| testcases/GoodQualityMaintainabilityWithCrossSub.ql:1:1:12:3 | QueryDoc | This query file has a sub-category of reliability but is missing the `@tags reliability` tag. |
+| testcases/GoodQualityReliabilityWithCrossSub.ql:1:1:12:3 | QueryDoc | This query file has a sub-category of maintainability but is missing the `@tags maintainability` tag. |

ql/ql/test/queries/style/MissingQualityMetadata/testcases/GoodQualityMaintainabilityWithCrossSub.expected

@@ -0,0 +1,18 @@
+/**
+ * @name Some query
+ * @description Some description
+ * @kind problem
+ * @problem.severity warning
+ * @precision very-high
+ * @id ql/quality-query-test
+ * @tags quality
+ *       maintainability
+ *       readability
+ *       correctness
+ */
+
+import ql
+
+from Class c
+where none()
+select c, ""

ql/ql/test/queries/style/MissingQualityMetadata/testcases/GoodQualityMaintainabilityWithCrossSub.ql

@@ -0,0 +1,18 @@
+/**
+ * @name Some query
+ * @description Some description
+ * @kind problem
+ * @problem.severity warning
+ * @precision very-high
+ * @id ql/quality-query-test
+ * @tags quality
+ *       reliability
+ *       correctness
+ *       readability
+ */
+
+import ql
+
+from Class c
+where none()
+select c, ""