Ql4Ql: Add some quality tag testcases.

Author: michaelnebel

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

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

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

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

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

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

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

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

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

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+/**
+ * @name Some query
+ * @description Some description
+ * @kind problem
+ * @problem.severity warning
+ * @security-severity 10.0
+ * @precision very-high
+ * @id ql/quality-query-test
+ * @tags security
+ */
+
+import ql
+
+from Class c
+where none()
+select c, ""