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

cta/CTA#877 ObjectStore.RetrieveQueueAlgorithms unit tests fails or succeeds base on version of cmake

As suggested by Michal I've added the missing declaration of the
full specialised getElementSummary() method.  This fixes the
problem.  Where there were two "defined" symbols now there is
only one:

[itctabuild02] CTA (master) > nm /lib64/libctaobjectstoreunittests.so.0 | grep _ZN3cta11objectstore15ContainerTraitsINS0_13RetrieveQueueENS0_23RetrieveQueueToTransferEE17getElementSummaryERKNS4_13PoppedElementE
                 U _ZN3cta11objectstore15ContainerTraitsINS0_13RetrieveQueueENS0_23RetrieveQueueToTransferEE17getElementSummaryERKNS4_13PoppedElementE
[itctabuild02] CTA (master) > nm /lib64/libctaobjectstore.so.0 | grep _ZN3cta11objectstore15ContainerTraitsINS0_13RetrieveQueueENS0_23RetrieveQueueToTransferEE17getElementSummaryERKNS4_13PoppedElementE
000000000047afa8 T _ZN3cta11objectstore15ContainerTraitsINS0_13RetrieveQueueENS0_23RetrieveQueueToTransferEE17getElementSummaryERKNS4_13PoppedElementE
[itctabuild02] CTA (master) >

#881 cta-fst-gcd logs can be now sent to stdout by command line option for container based deployments

Updated ImmutableFileTest.cpp in order to handle the fact that kXR_ChkLenErr has been removed in XRootD 5

Updated ImmutableFileTest.cpp in order to handle the fact that XrdCl::OpenFlags::Append has been removed in XRootD 5 as requested by CTA

CMake Warning (dev) at
/usr/share/cmake3/Modules/FindPackageHandleStandardArgs.cmake:272
(message):
  The package name passed to `find_package_handle_standard_args` (gRPC)
does
  not match the name of the calling package (GRPC).  This can lead to
  problems in calling code that expects `find_package` result variables
  (e.g., `_FOUND`) to follow a certain pattern.
Call Stack (most recent call first):
  cmake/FindGRPC.cmake:125 (FIND_PACKAGE_HANDLE_STANDARD_ARGS)
  eos_cta/CMakeLists.txt:19 (find_package)
This warning is for project developers.  Use -Wno-dev to suppress it.

[objectstore] Fixed cta/CTA#875 gtest cannot safely print ContainerTraits<ArchiveQueue,ArchiveQueueToTransferForUser>::PoppedElementsSummary

[cmake] Fixed cta/CTA#872 Fix naming convention bug in CTA/cmake/Findxrootdclient.cmake found by cmake3

Implements "cta-admin failedrequest rm"

See merge request cta/CTA!8

Also deletes all unused options which were defined for commands that
no longer exist

Information is not a countable noun in English (it can't be plural).