Fixes #15417: rudder-webapp package cannot install, as the webapp exits when the ldap is not initialized

[ncharles]

https://issues.rudder.io/issues/15417

[Normation-Quality-Assistant]

This PR breaks qa-test

-- stdout -- 
Branch 'branches/rudder/5.0' set up to track remote branch 'branches/rudder/5.0' from 'NRM'.
Your branch is up to date with 'NRM/branches/rudder/5.0'.
Already up to date.
Already up to date.
[...]

-- stderr --
From github.com:ncharles/rudder-packages
 * [new branch]        bug_15417/rudder_webapp_package_cannot_install_as_the_webapp_exits_when_the_ldap_is_not_initialized -> bug_15417/rudder_webapp_package_cannot_install_as_the_webapp_exits_when_the_ldap_is_not_initialized_pr
Switched to branch 'branches/rudder/5.0'
Switched to a new branch '5.0_test'
+ find ./rudder-server-relay/SOURCES/relay-api/relay_api -name '*.py'
+ xargs pylint -E --disable=C,R,no-member,no-name-in-module --persistent=n
No config file found, using default configuration

You should run ./qa-test in your repository to make sure it works.
You can also run rudder-dev merge https://github.com/Normation/rudder-packages/pull/2024 --test to test with upmerging.
After this, you can remove the qa: Can't merge ta
-- Your faithful QA (https://ci.normation.com/jenkins/job/merge-accepted-pr/13342/console)

[Fdall]

OK, merging this PR