* lisp/ob-sql.el (org-babel-execute:sql, org-babel-sql-dbstring-saphana):
Add basic support for SAP HANA to SQL blocks.
* testing/lisp/test-ob-sql.el: Basic tests for generated db connection
string.
This change adds basic support for SAP HANA to SQL blocks by
specifying saphana as :engine.
It also adds a new header arg `dbinstance' in order to specify the SAP
HANA instance to connect to.
