[transaction] initialize dbapi_request in __init__
There is not reason to have it implicitly declared.
The attribute is renamed to match its public name.
#! /bin/sh -e#if [ "$1" = configure ]; then if which install-docs >/dev/null 2>&1; then install-docs -i /usr/share/doc-base/cubicweb-doc fifi#DEBHELPER#exit 0