Test: fail the build with an inspectcode warning

Author: Bart Koelman

JsonApiDotNetCore.sln.DotSettings

@@ -75,6 +75,7 @@ JsonApiDotNetCore.ArgumentGuard.NotNull($EXPR$, $NAME$);</s:String>
 	<s:String x:Key="/Default/CodeInspection/Highlighting/InspectionSeverities/=TailRecursiveCall/@EntryIndexedValue">SUGGESTION</s:String>
 	<s:String x:Key="/Default/CodeInspection/Highlighting/InspectionSeverities/=TryCastAlwaysSucceeds/@EntryIndexedValue">WARNING</s:String>
 	<s:String x:Key="/Default/CodeInspection/Highlighting/InspectionSeverities/=UnnecessaryWhitespace/@EntryIndexedValue">HINT</s:String>
+	<s:String x:Key="/Default/CodeInspection/Highlighting/InspectionSeverities/=UnusedMember_002EGlobal/@EntryIndexedValue">WARNING</s:String>
 	<s:String x:Key="/Default/CodeInspection/Highlighting/InspectionSeverities/=UseCollectionCountProperty/@EntryIndexedValue">WARNING</s:String>
 	<s:String x:Key="/Default/CodeInspection/Highlighting/InspectionSeverities/=VirtualMemberNeverOverridden_002ELocal/@EntryIndexedValue">WARNING</s:String>
 	<s:String x:Key="/Default/CodeStyle/CodeCleanup/Profiles/=JADNC_0020Full_0020Cleanup/@EntryIndexedValue">&lt;?xml version="1.0" encoding="utf-16"?&gt;&lt;Profile name="JADNC Full Cleanup"&gt;&lt;XMLReformatCode&gt;True&lt;/XMLReformatCode&gt;&lt;CSCodeStyleAttributes ArrangeTypeAccessModifier="True" ArrangeTypeMemberAccessModifier="True" SortModifiers="True" RemoveRedundantParentheses="True" AddMissingParentheses="True" ArrangeBraces="True" ArrangeAttributes="True" ArrangeArgumentsStyle="True" ArrangeCodeBodyStyle="True" ArrangeVarStyle="True" ArrangeTrailingCommas="True" ArrangeObjectCreation="True" ArrangeDefaultValue="True" /&gt;&lt;CssAlphabetizeProperties&gt;True&lt;/CssAlphabetizeProperties&gt;&lt;JsInsertSemicolon&gt;True&lt;/JsInsertSemicolon&gt;&lt;FormatAttributeQuoteDescriptor&gt;True&lt;/FormatAttributeQuoteDescriptor&gt;&lt;CorrectVariableKindsDescriptor&gt;True&lt;/CorrectVariableKindsDescriptor&gt;&lt;VariablesToInnerScopesDescriptor&gt;True&lt;/VariablesToInnerScopesDescriptor&gt;&lt;StringToTemplatesDescriptor&gt;True&lt;/StringToTemplatesDescriptor&gt;&lt;JsReformatCode&gt;True&lt;/JsReformatCode&gt;&lt;JsFormatDocComments&gt;True&lt;/JsFormatDocComments&gt;&lt;RemoveRedundantQualifiersTs&gt;True&lt;/RemoveRedundantQualifiersTs&gt;&lt;OptimizeImportsTs&gt;True&lt;/OptimizeImportsTs&gt;&lt;OptimizeReferenceCommentsTs&gt;True&lt;/OptimizeReferenceCommentsTs&gt;&lt;PublicModifierStyleTs&gt;True&lt;/PublicModifierStyleTs&gt;&lt;ExplicitAnyTs&gt;True&lt;/ExplicitAnyTs&gt;&lt;TypeAnnotationStyleTs&gt;True&lt;/TypeAnnotationStyleTs&gt;&lt;RelativePathStyleTs&gt;True&lt;/RelativePathStyleTs&gt;&lt;AsInsteadOfCastTs&gt;True&lt;/AsInsteadOfCastTs&gt;&lt;HtmlReformatCode&gt;True&lt;/HtmlReformatCode&gt;&lt;AspOptimizeRegisterDirectives&gt;True&lt;/AspOptimizeRegisterDirectives&gt;&lt;RemoveCodeRedundancies&gt;True&lt;/RemoveCodeRedundancies&gt;&lt;CSUseAutoProperty&gt;True&lt;/CSUseAutoProperty&gt;&lt;CSMakeFieldReadonly&gt;True&lt;/CSMakeFieldReadonly&gt;&lt;CSMakeAutoPropertyGetOnly&gt;True&lt;/CSMakeAutoPropertyGetOnly&gt;&lt;CSArrangeQualifiers&gt;True&lt;/CSArrangeQualifiers&gt;&lt;CSFixBuiltinTypeReferences&gt;True&lt;/CSFixBuiltinTypeReferences&gt;&lt;CssReformatCode&gt;True&lt;/CssReformatCode&gt;&lt;CSOptimizeUsings&gt;&lt;OptimizeUsings&gt;True&lt;/OptimizeUsings&gt;&lt;EmbraceInRegion&gt;False&lt;/EmbraceInRegion&gt;&lt;RegionName&gt;&lt;/RegionName&gt;&lt;/CSOptimizeUsings&gt;&lt;CSShortenReferences&gt;True&lt;/CSShortenReferences&gt;&lt;CSReformatCode&gt;True&lt;/CSReformatCode&gt;&lt;CSharpFormatDocComments&gt;True&lt;/CSharpFormatDocComments&gt;&lt;CSReorderTypeMembers&gt;True&lt;/CSReorderTypeMembers&gt;&lt;XAMLCollapseEmptyTags&gt;False&lt;/XAMLCollapseEmptyTags&gt;&lt;/Profile&gt;</s:String>