Added new queries for switch statement anomalies

Sample rules/X++/SwitchDuplicateDefault.xq

@@ -5,7 +5,6 @@
 Having more than one default part is semantically correct in X++
 but makes maintenance much more difficult :)
 
-(: Note: This does not find references updated with byref parameters :)
 (: @Language Xpp :)
 (: @Category Informational :)
 

Sample rules/X++/SwitchNonConstantCases.xq

@@ -0,0 +1,23 @@
+(: Copyright (c) Microsoft Corporation.
+   Licensed under the MIT license. :)
+
+(: Find switch statements that have case entries that are not constants :)
+(: There is nothing semantically incorrect about this, except that it 
+may have maintainablity problems :)
+
+(: @Language Xpp :)
+(: @Category Informational :)
+<SwitchNonConstantCases>
+{
+  for $a in /(Class | Table | Form | Query)
+  for $sw in $a//SwitchStatement
+  for $cvs in $sw/CaseValues
+  where not( $cvs/(IntLiteralExpression | StringLiteralExpression | Int64LiteralExpression | RealLiteralExpression | QualifiedStaticFieldExpression | Intrinsic))
+  return <SwitchNonConstantCase Artifact='{$a/@Artifact}'
+    StartLine='{$sw/@StartLine}' StartCol='{$sw/@StartCol}' EndLine='{$sw/@EndLine}' EndCol='{$sw/@EndCol}'>
+    {
+       (: $cvs :)
+    }
+    </SwitchNonConstantCase>
+}
+</SwitchNonConstantCases>