Use retry() macro in front of all package-installing commands

Detailed Description

Extends !2395 (merged), use retry() to run apt-get and yum commands.

The macro itself now accepts command line arguments, as documented in .gitlab-ci.yml:

#
# Run a command up to 5 times with delays, mainly to survive
# transient network issues. The delay starts at 15 seconds,
# and increases by 15 seconds after each retry.
#
# Usage:
#   retry [--max-try <2--5>]
#         [--exit-patt <awk-pattern>]
#         [--cleanup-cmd <cleanup-command>]
#         [--]
#         <command> <args>...
#
# Options:
#   --max-try:
#       How many times to try <command> (2--5, default: 3).
#   --exit-patt:
#       Fail if <awk-pattern> is detected in the output of
#       <command>. A default pattern may also be set using
#       the $RETRY_EXIT_PATT environment variable.
#   --cleanup-cmd:
#       Run <cleanup-command> before retrying <command>. A
#       default cleanup command may also be set using the
#       $RETRY_CLEANUP_CMD environment variable.
#

See #790 (closed)

API Changes

• These changes do not modify the API.
• These changes are backwards compatible.
• These changes are backwards incompatible.

For examples of changes that do not modify the API and/or are considered backwards (in)compatible, please see the contributing guide.

Justification for Backwards Incompatible Changes

n/a

Review Status

n/a