Retry queueing in ArchiveQueueToReportToRepackForSuccess if switchElementsOwnership fails because of a rados::lockbackoff() problem

Added repack ls command at repack failure in repack system test

Changed the freeSpaceQueryURL Regex in order to prepare for the parsing of the EOS Space name in DiskSystem

cta-migration-tools does not need castor-dbtools, it is sufficient to
depend on cx_Oracle.

Revert "vanilla eos 4.6.2 is not a drop in replacement 4.6.2-20191118180911git0fe7966 is compiled against standalone xrootd 4.11"

This reverts commit b2157fe9f0d685640db34e6b78101f917554a54a.

vanilla eos 4.6.2 is not a drop in replacement 4.6.2-20191118180911git0fe7966 is compiled against standalone xrootd 4.11

Revert "Modified cta.spec.in to avoid problem with official Oracle RPMS not listing libocci.so as a capability"

This reverts commit 62179df5.

Revert "Modified cta.spec.in to deal with the fact that that the official ORacle rpms do not list the 64-bit version of the libclntsh.so capability"

This reverts commit 338d7775.

Revert "Added oracle-instantclient-tnsnames.ora which was implicitly being installed by oracle-instantclient19.3-meta which we no longer install"

This reverts commit 8083df2a.

This reverts commit eede4fb2.

Added oracle-instantclient-tnsnames.ora which was implicitly being installed by oracle-instantclient19.3-meta which we no longer install

Modified cta.spec.in to deal with the fact that that the official ORacle rpms do not list the 64-bit version of the libclntsh.so capability

Modified cta.spec.in to avoid problem with official Oracle RPMS not listing libocci.so as a capability

Upgraded to EOS 4.6.1-20191104142842git30eddf6 in order to get the missing commits for being able to configure the EOS space written to be tape servers

Changed the log message at the starting of cta-taped. If an exception happens, the error messages will tell that cta-taped cannot start.

Upgraded to EOS 4.6.1-20191106151453git21dd306 in order to be able to configure the EOS space written to be tape servers

Corrected cta-objectstore-initialize program. The agent needed to initialize the objectstore was not locked so could not be deleted.
If this program fails for whatever reason, it will return EXIT_FAILURE and not EXIT_SUCCESS

This reverts commit e5f27c34.

This reverts commit edf98416.

docker/ctafrontend/cc7/opt/run/bin/init.sh now installs the standard oracle-instantclient19.3-sqlplus rpm instead of the CERN version

Revert "Top CMakeLists.txt now explicitly lists all the REQUIRED components to be found by cmake/Findoracle-instantclient.cmake"

This reverts commit 0ee95f93.

Modified Findoracle-instantclient.cmake to explicitly look for libocci.so.19.1 because the oracle-instantclient19.3-devel rpm does not create the symbolic link /usr/lib/oracle/19.3/client64/lib/libocci.so

Top CMakeLists.txt now explicitly lists all the REQUIRED components to be found by cmake/Findoracle-instantclient.cmake

- Added tool to drop from the CTA catalogue all CASTOR tapes from a given tapepool.
  This tool makes use of a temporary table and an additional PL/SQL procedure
  in order to perform efficient bulk operations in the CTA catalogue.
- Made tapepool insertion idempotent.
- Updated documentation.