TrigValTools: Add rootcomp unit test and cleanup

• add a unit test for rootcomp.py
• enable flake8 for all python files and make them compliant
• delete trigslimval.py, TRoot2Html and related files (ATR-20090)

Trigger/TrigValidation/TrigValTools/TrigValTools/TRoot2Html.h

-/*
-  Copyright (C) 2002-2018 CERN for the benefit of the ATLAS collaboration
-*/
-
-#ifndef TRIGVALTOOLS_TROOT2HTML_H
-#define TRIGVALTOOLS_TROOT2HTML_H
-
-/**
- * @file   TRoot2Html.h
- * @brief  TRoot2Html class
- * @author Frank Winklmeier
- *
- * $Id: TRoot2Html.h 702373 2015-10-22 13:55:56Z fwinkl $
- */
-
-#include <fstream>
-#include <vector>
-
-#include "TMultiFileLooper.h"
-#include "TDirectory.h"
-#include "TString.h"
-#include "TH1.h"
-
-class TPRegexp;
-
-/**
- * @class  TRoot2Html
- * @brief  Create a (static) web page from ROOT histograms
- * @author Frank Winklmeier
- *
- * Create images from histograms in root files and assemble them in
- * a web page with a tree like naviation structure.
- */
-class TRoot2Html : public TMultiFileLooper {
- public:
-
-  /// C'tor
-  TRoot2Html();
-  /// D'tor
-  virtual ~TRoot2Html() {}
-  /// Copy C'tor (needed for Reflex dictionary generation)
-  TRoot2Html(const TRoot2Html& other);
-
-  /// \name Processing hooks
-  //@{
-  virtual void beginJob();
-  virtual void endJob();
-  virtual void beforeFile();
-  virtual void afterFile();
-  virtual void beforeDir();
-  virtual void afterDir();
-  virtual void processKey(TDirectory& dir, TKey& key);
-  //@}
-  
-  /// Output directory for HTML pages
-  void setOutputDir(const char* dir) {m_outDir = dir;}
-
-  /// Set image size
-  void setImageSize(Int_t width, Int_t height) {m_imgWidth = width; m_imgHeight = height;}
-
-  /// Add draw options for images (selected by regular expression on name)
-  void addDrawOptions(const char* regexp, const char* options);
-
-  /// Add draw options for images (selected by regular expression on class name)
-  void addClassDrawOptions(const char* regexp, const char* options);
-    
-  /// Show full file name in tree
-  void showFullFileName(Bool_t show = kTRUE) {m_showFullFileName = show;}
-  
- private:
-  TString m_fileList;
-  TString m_outDir;
-  Int_t m_imgHeight, m_imgWidth;
-  std::ofstream m_xml;
-  Int_t m_nodeId;
-  
-  Bool_t m_showFullFileName;
-  std::vector< std::pair<TPRegexp*,TString> > m_drawOptions;
-  std::vector< std::pair<TPRegexp*,TString> > m_classDrawOptions;
-    
-  TString hist2Png(TDirectory& dir, const TString& name);
-  TString getDrawOptions(const TH1& h);
-    
-  TString xmlTreeItem(const char* text);
-  TString xmlTreeItemClose();
-  TString xmlUserData(const char* name, const char* data);
-
-  // Not copyable due to the ofstream.
-  TRoot2Html& operator= (const TRoot2Html&);
-};
-
-#endif