[catalogue] Corrected the slowliness of the RdbmsCatalogue::getArchiveFileToRetrieveByArchiveFileId() method

[scheduler] Change DEBUG to INFO log level on Scheduler::getNextMount() and Scheduler::getNextMountDryRun() when a mount is going to be triggered

To make it more self-contained

Move oracle repo setup to bootstrapCTA

The RdbmsCatalogue::getArchiveFileToRetrieveByArchiveFileId() method has been modified to return only active (non superseded) files for retrieval

Fixed.

Fixed

But ignore useradd error

It may be missing from the system. Instead of adding it, try to install everything from public repositories

Newly created user should be able to immediately run bootstrapCTA.sh. Therefore CTA repo should already be present in a home directory

- remove gitlab credentials
- set up default cta user OR
- set up custom user (accept name as an argument)
- add `sudo's` to allow running this script not as root

Ceph packages are installed from cta-ci-ceph-nautilus repository located in continuousintegration/docker/ctafrontend/cc7/etc/yum.repos.d/cta-ci.repo