rs support output constant value from refcursor
remove and comment some code
add req_oracle2.js
all req kv go into ra.params

so kv transfer is easy and stable,
oracle side will never raise exception for reading incoming KV stream data.
node can write KV easier than before.
oracle will not receive cookie header

because parsed cookie is send to oracle already,
rs found bug, no , begin
req KV send easy, receive safer, all in ra.params