Adding account move select reconciliation 7

This module allows to manually select the journal item to be reconciled while
registering a journal entry.

**Example** (also see the included test case)

You have an open credit and you need to close it by a manual journal entry.
With this module you can manually create the payment journal entry, select the
open credit and click 'Reconcile Line'. The system will close the credit
generating the respective reconciliation.
See https://github.com/eLBati/account-financial-tools/pull/1