Fixes #5801: remove parameter ${rudder.node.env.XXX}
Fixes #5808: Handle missing techniques with active techniques in trees
Merge pull request #663 from fanf/ust_5225/bug_5801/do_not_replace_env_parameters

Ust 5225/bug 5801/do not replace env parameters
Merge pull request #664 from fanf/bug_5808/manage_missing_techniques_in_trees

Fixes #5808: Handle missing techniques with active techniques in trees
Merge branch 'branches/rudder/2.10' into branches/rudder/2.11
Merge branch 'branches/rudder/2.11' into branches/rudder/3.0
Fixes #5831: remove test on node.env
Merge pull request #667 from ncharles/bug_5831/dev/remove_invalid_test

Fixes #5831: remove test on node.env
Fixes #5834: Add group filter on group page
Fixes #5830: Use technique updates to enable/disable active techniques
Merge pull request #666 from fanf/ust_5670/impl_5830/auto_enable_new_techniques

Fixes #5830: Use technique updates to enable/disable active techniques
Merge pull request #669 from VinceMacBuche/ust_5833/implem_5834/add_group_filter

Fixes #5834: Add group filter on group page
Fixes #5577: Add Backend and UI for Heartbeat configuration feature