[C#] Test package override support compiles.

Co-authored-by: Nate Bradac <nate.bradac@weareadaptive.com>

We've updated the C# generation tasks to include a schema that uses
explicit package names on `types` blocks.

We found processing this schema produces some build errors (albeit not
affecting the exit code):

```
> Task :generateCSharpTestCodecs
[Error] explicit-package-test-schema.xml:17:49: cvc-complex-type.3.2.2: Attribute 'package' is not allowed to appear in element 'types'.
[Error] explicit-package-test-schema.xml:30:37: cvc-complex-type.3.2.2: Attribute 'package' is not allowed to appear in element 'types'.

> Task :generateCSharpTestDtos
[Error] explicit-package-test-schema.xml:17:49: cvc-complex-type.3.2.2: Attribute 'package' is not allowed to appear in element 'types'.
[Error] explicit-package-test-schema.xml:30:37: cvc-complex-type.3.2.2: Attribute 'package' is not allowed to appear in element 'types'.
```

Therefore, we've put the new generation under tasks that don't validate
against an XSD. We considered creating a new version of the XSD that
properly describes what we support; however, the licence on the XSD
seems prohibitive.

Author: ZachBray

.gitignore

@@ -94,6 +94,7 @@ csharp/sbe-generated/since-deprecated
 csharp/sbe-generated/order_check
 csharp/sbe-generated/mktdata/*.cs
 csharp/sbe-generated/uk_co_real_logic_sbe_benchmarks_fix
+csharp/sbe-generated/test_message_schema
 csharp/sbe-tests/*.sbe
 csharp/nuget/
 csharp/csharp.sln.DotSettings.user

build.gradle

@@ -894,7 +894,8 @@ tasks.register('generateCSharpTestCodecs', JavaExec) {
             'sbe.target.language': 'uk.co.real_logic.sbe.generation.csharp.CSharp',
             'sbe.xinclude.aware': 'true',
             'sbe.validation.xsd': validationXsdPath,
-            'sbe.generate.precedence.checks': 'true')
+            'sbe.generate.precedence.checks': 'true',
+            'sbe.types.package.override': 'true')
     args = ['sbe-tool/src/test/resources/FixBinary.xml',
             'sbe-tool/src/test/resources/issue435.xml',
             'sbe-tool/src/test/resources/issue483.xml',
@@ -912,15 +913,41 @@ tasks.register('generateCSharpTestDtos', JavaExec) {
             'sbe.output.dir': 'csharp/sbe-generated',
             'sbe.target.language': 'uk.co.real_logic.sbe.generation.csharp.CSharpDtos',
             'sbe.xinclude.aware': 'true',
-            'sbe.validation.xsd': validationXsdPath)
+            'sbe.validation.xsd': validationXsdPath,
+            'sbe.types.package.override': 'true')
     args = ['sbe-samples/src/main/resources/example-extension-schema.xml']
 }
 
+tasks.register('generateCSharpExplicitPackageOverrideCodecs', JavaExec) {
+    mainClass.set('uk.co.real_logic.sbe.SbeTool')
+    classpath = project(':sbe-tool').sourceSets.main.runtimeClasspath
+    systemProperties(
+            'sbe.output.dir': 'csharp/sbe-generated',
+            'sbe.target.language': 'uk.co.real_logic.sbe.generation.csharp.CSharp',
+            'sbe.xinclude.aware': 'true',
+            'sbe.generate.precedence.checks': 'true',
+            'sbe.types.package.override': 'true')
+    args = ['sbe-tool/src/test/resources/explicit-package-test-schema.xml']
+}
+
+tasks.register('generateCSharpExplicitPackageOverrideDtos', JavaExec) {
+    mainClass.set('uk.co.real_logic.sbe.SbeTool')
+    classpath = project(':sbe-tool').sourceSets.main.runtimeClasspath
+    systemProperties(
+            'sbe.output.dir': 'csharp/sbe-generated',
+            'sbe.target.language': 'uk.co.real_logic.sbe.generation.csharp.CSharpDtos',
+            'sbe.xinclude.aware': 'true',
+            'sbe.types.package.override': 'true')
+    args = ['sbe-tool/src/test/resources/explicit-package-test-schema.xml']
+}
+
 tasks.register('generateCSharpCodecs') {
     description = 'Generate csharp codecs'
     dependsOn 'generateCSharpTestCodecs',
             'generateCSharpTestDtos',
-            'generateCSharpCodecsWithXIncludes'
+            'generateCSharpCodecsWithXIncludes',
+            'generateCSharpExplicitPackageOverrideCodecs',
+            'generateCSharpExplicitPackageOverrideDtos'
 }
 
 tasks.register('generateJavaIrCodecs', JavaExec) {

sbe-tool/src/main/java/uk/co/real_logic/sbe/generation/csharp/CSharpDtos.java

@@ -20,6 +20,8 @@
 import uk.co.real_logic.sbe.generation.TargetCodeGenerator;
 import uk.co.real_logic.sbe.ir.Ir;
 
+import static uk.co.real_logic.sbe.SbeTool.TYPES_PACKAGE_OVERRIDE;
+
 /**
  * {@link CodeGenerator} factory for CSharp DTOs.
  */
@@ -30,6 +32,11 @@ public class CSharpDtos implements TargetCodeGenerator
      */
     public CodeGenerator newInstance(final Ir ir, final String outputDir)
     {
-        return new CSharpDtoGenerator(ir, false, new CSharpNamespaceOutputManager(outputDir, ir.applicableNamespace()));
+        final boolean shouldSupportTypesPackageNames = Boolean.getBoolean(TYPES_PACKAGE_OVERRIDE);
+        return new CSharpDtoGenerator(
+            ir,
+            shouldSupportTypesPackageNames,
+            new CSharpNamespaceOutputManager(outputDir, ir.applicableNamespace())
+        );
     }
 }