THRIFT-2729: C++ - .clang-format created and applied

Client: C++
Patch: Konrad Grochowski

make style command added
diff --git a/lib/cpp/src/thrift/concurrency/Exception.h b/lib/cpp/src/thrift/concurrency/Exception.h
index c62f116..6438fda 100644
--- a/lib/cpp/src/thrift/concurrency/Exception.h
+++ b/lib/cpp/src/thrift/concurrency/Exception.h
@@ -23,7 +23,9 @@
 #include <exception>
 #include <thrift/Thrift.h>
 
-namespace apache { namespace thrift { namespace concurrency {
+namespace apache {
+namespace thrift {
+namespace concurrency {
 
 class NoSuchTaskException : public apache::thrift::TException {};
 
@@ -39,26 +41,24 @@
 
 class TimedOutException : public apache::thrift::TException {
 public:
-  TimedOutException():TException("TimedOutException"){};
-  TimedOutException(const std::string& message ) :
-    TException(message) {}
+  TimedOutException() : TException("TimedOutException"){};
+  TimedOutException(const std::string& message) : TException(message) {}
 };
 
 class TooManyPendingTasksException : public apache::thrift::TException {
 public:
-  TooManyPendingTasksException():TException("TooManyPendingTasksException"){};
-  TooManyPendingTasksException(const std::string& message ) :
-    TException(message) {}
+  TooManyPendingTasksException() : TException("TooManyPendingTasksException"){};
+  TooManyPendingTasksException(const std::string& message) : TException(message) {}
 };
 
 class SystemResourceException : public apache::thrift::TException {
 public:
-    SystemResourceException() {}
+  SystemResourceException() {}
 
-    SystemResourceException(const std::string& message) :
-        TException(message) {}
+  SystemResourceException(const std::string& message) : TException(message) {}
 };
-
-}}} // apache::thrift::concurrency
+}
+}
+} // apache::thrift::concurrency
 
 #endif // #ifndef _THRIFT_CONCURRENCY_EXCEPTION_H_