Fix build of pgsql connector (std::hash -> boost::hash)

Signed-off-by: Fridrich Štrba <fridrich.strba@bluewin.ch>

connectivity/source/drivers/postgresql/pq_connection.hxx

@@ -183,7 +183,7 @@ typedef ::boost::unordered_map
 <
     const sal_Int32,
     rtl::OUString,
-    ::std::hash< sal_Int32 >,
+    ::boost::hash< sal_Int32 >,
     ::std::equal_to< sal_Int32 >,
     Allocator< ::std::pair< sal_Int32, ::rtl::OUString > >
 > Int2StringMap;

connectivity/source/drivers/postgresql/pq_databasemetadata.cxx

@@ -1455,7 +1455,7 @@ typedef ::boost::unordered_map
 <
     sal_Int32,
     DatabaseTypeDescription,
-    ::std::hash< sal_Int32 >,
+    ::boost::hash< sal_Int32 >,
     ::std::equal_to< sal_Int32 >,
     Allocator< ::std::pair< sal_Int32, DatabaseTypeDescription > >
 > Oid2DatabaseTypeDescriptionMap;

connectivity/source/drivers/postgresql/pq_resultsetmetadata.cxx

@@ -181,14 +181,6 @@ ResultSetMetaData::ResultSetMetaData(
     }
 }
 
-// typedef std::hash_map<
-//     Oid,
-//     rtl::OUString,
-//     std::hash< Oid >,
-//     std::equal_to< Oid >,
-//     Allocator < std::pair< Oid, rtl::OUString > > >  PqTypeMap;
-
-
 void ResultSetMetaData::checkForTypes()
 {
     if( ! m_checkedForTypes )