Add new physical tape library table to the CTA catalogue

• For details check #276
• We will use 3NF in most cases, but for this specific table it was decided that it is unnecessary.

Tape server querying DB at very high rate

• It seems that the changes are having the expected results (significant reduction in number of DB queries).
• In addition, this seems to have reduced the average duration of fetchMountInfo(...) from 8 to 2 seconds.
• On monday a new analysis will be done to confirm these results.

Other

• We must develop the counter logging system, ASAP. This can be added as part of the stress tests and monitoring to detect important variations in performance.
• Add a dCatche stick topic to the CTA dev planning