Create the cta statistics database
This issue is linked with #729 (closed)
Problem to solve
The CTA statistics tool that will be created in #745 (closed) need to store statistics about the amount of master files and bytes stored in CTA. We will hence have to create a database for that.
Intended users
CTA statistics tool
Proposal
This database will contain only one table CTA_STATISTICS that will contain the amount of master files, the amount of master bytes and the date at which these values have been computed by the CTA statistics tool.