CTest: Allow SUBMIT_INDEX with CDash

If CTEST_DROP_SITE_CDASH is true then SUBMIT_INDEX is supported.
The Dart version does not matter because the server is not Dart.

Source/CTest/cmCTestHandlerCommand.cxx

@@ -121,7 +121,7 @@ bool cmCTestHandlerCommand
     }
   if ( this->Values[ct_SUBMIT_INDEX] )
     {
-    if ( this->CTest->GetDartVersion() <= 1 )
+    if(!this->CTest->GetDropSiteCDash() && this->CTest->GetDartVersion() <= 1)
       {
       cmCTestLog(this->CTest, ERROR_MESSAGE,
         "Dart before version 2.0 does not support collecting submissions."

Source/cmCTest.cxx

@@ -327,6 +327,7 @@ cmCTest::cmCTest()
   this->OutputLogFileLastTag   = -1;
   this->SuppressUpdatingCTestConfiguration = false;
   this->DartVersion            = 1;
+  this->DropSiteCDash          = false;
   this->OutputTestOutputOnTestFailure = false;
   this->ComputedCompressTestOutput = false;
   this->ComputedCompressMemCheckOutput = false;
@@ -653,6 +654,7 @@ bool cmCTest::InitializeFromCommand(cmCTestStartCommand* command)
     = this->GetCTestConfiguration("SourceDirectory").c_str();
   std::string bld_dir = this->GetCTestConfiguration("BuildDirectory").c_str();
   this->DartVersion = 1;
+  this->DropSiteCDash = false;
   for(Part p = PartStart; p != PartCount; p = Part(p+1))
     {
     this->Parts[p].SubmitFiles.clear();
@@ -719,6 +721,7 @@ bool cmCTest::InitializeFromCommand(cmCTestStartCommand* command)
       return false;
       }
     }
+  this->DropSiteCDash = mf->IsOn("CTEST_DROP_SITE_CDASH");
 
   if ( !this->Initialize(bld_dir.c_str(), command) )
     {

Source/cmCTest.h

@@ -384,6 +384,7 @@ public:
 
   //! Get the version of dart server
   int GetDartVersion() { return this->DartVersion; }
+  int GetDropSiteCDash() { return this->DropSiteCDash; }
 
   //! Add file to be submitted
   void AddSubmitFile(Part part, const char* name);
@@ -549,6 +550,7 @@ private:
   bool Quiet;
 
   int  DartVersion;
+  bool DropSiteCDash;
 
   std::vector<cmStdString> InitialCommandLineArguments;