TestCmdlineParser: store messages in logger class instead of utilizing the redirect (#5482)

test/fixture.cpp

@@ -104,6 +104,7 @@ bool TestFixture::prepareTest(const char testname[])
         } else {
             std::cout << classname << "::" << mTestname << std::endl;
         }
+        teardownTestInternal();
         return true;
     }
     return false;

test/fixture.h

@@ -61,6 +61,7 @@ protected:
 
     bool prepareTest(const char testname[]);
     virtual void prepareTestInternal() {}
+    virtual void teardownTestInternal() {}
     std::string getLocationStr(const char * const filename, const unsigned int linenr) const;
 
     bool assert_(const char * const filename, const unsigned int linenr, const bool condition) const;