Add more tests

remove "sendQuery" on function
sendQuery now return QueryResult
remove null on queryError message

src/test/resources/sql/query/Test/selectMultipleDifferentArgs.sql

@@ -0,0 +1 @@
+SELECT :first::text as "firstName", :second::text as "secondName";

src/test/resources/sql/query/Test/selectMultipleWithSameArgs.sql

@@ -0,0 +1 @@
+SELECT :name::text as "firstName", :name::text as "secondName";