moved session to namespace query and move basic_schema::initialize to session constructor

test/backends/SessionInsertHasMany.cpp

@@ -4,10 +4,13 @@
 
 #include "connection.hpp"
 
+#include "matador/query/session.hpp"
+
 #include "models/author.hpp"
 #include "models/book.hpp"
 
 using namespace matador;
+using namespace matador::query;
 using namespace matador::object;
 using namespace matador::test;
 
@@ -58,8 +61,7 @@ TEST_CASE_METHOD(SessionFixture, "Test insert object with has many relation", "[
     .and_then([this] { return schema.create(db); } );
   REQUIRE(result.is_ok());
 
-  orm::session ses({bus, connection::dns, 4}, schema);
-  schema.initialize(ses);
+  session ses({bus, connection::dns, 4}, schema);
 
   auto s_king = make_object<author>(1, "Steven", "King", "21.9.1947", 1956, false);
 
@@ -79,8 +81,7 @@ TEST_CASE_METHOD(SessionFixture, "Test insert object with has many relation with
     .and_then([this] { return schema.create(db); } );
   REQUIRE(result.is_ok());
 
-  orm::session ses({bus, connection::dns, 4}, schema);
-  schema.initialize(ses);
+  session ses({bus, connection::dns, 4}, schema);
 
   auto s_king = make_object<author_identity>("Steven King");