Replace TR1 headers with standard headers

Now that the C++11 standard is the default one, we can remove the TR1
headers and classes.

server/core/internal/httprequest.hh

@@ -17,7 +17,7 @@
 #include <deque>
 #include <map>
 #include <string>
-#include <tr1/memory>
+#include <memory>
 #include <cstdint>
 #include <microhttpd.h>
 

server/core/internal/httpresponse.hh

@@ -16,7 +16,7 @@
 
 #include <map>
 #include <string>
-#include <tr1/memory>
+#include <memory>
 #include <microhttpd.h>
 
 #include <maxscale/jansson.hh>

server/core/log_manager.cc

@@ -362,9 +362,6 @@ private:
 namespace std
 {
 
-namespace tr1
-{
-
 template<>
 struct hash<MessageRegistryKey>
 {
@@ -377,8 +374,6 @@ struct hash<MessageRegistryKey>
     }
 };
 
-}
-
 template<>
 struct equal_to<MessageRegistryKey>
 {
@@ -428,7 +423,7 @@ public:
 
 private:
     mxs::SpinLock                       m_lock;
-    std::tr1::unordered_map<Key, Stats> m_registry;
+    std::unordered_map<Key, Stats>      m_registry;
 };
 
 }

server/core/queryclassifier.cc

@@ -12,7 +12,7 @@
  */
 
 #include <maxscale/queryclassifier.hh>
-#include <tr1/unordered_map>
+#include <unordered_map>
 #include <maxscale/alloc.h>
 #include <maxscale/modutil.h>
 #include <maxscale/query_classifier.h>
@@ -322,8 +322,8 @@ public:
     }
 
 private:
-    typedef std::tr1::unordered_map<uint32_t, uint32_t>    BinaryPSMap;
-    typedef std::tr1::unordered_map<std::string, uint32_t> TextPSMap;
+    typedef std::unordered_map<uint32_t, uint32_t>    BinaryPSMap;
+    typedef std::unordered_map<std::string, uint32_t> TextPSMap;
 
 private:
     BinaryPSMap m_binary_ps;

server/core/users.cc

@@ -14,7 +14,7 @@
 #include <maxscale/cppdefs.hh>
 
 #include <new>
-#include <tr1/unordered_map>
+#include <unordered_map>
 #include <string>
 #include <algorithm>
 
@@ -54,7 +54,7 @@ class Users
     Users& operator=(const Users&);
 
 public:
-    typedef std::tr1::unordered_map<std::string, UserInfo> UserMap;
+    typedef std::unordered_map<std::string, UserInfo> UserMap;
 
     Users()
     {