Fix AAA not placed as frontline unit

- Spawn AAA like SHORAD
- change SA-19 unit class from AAA to SHORAD

fixes #2194

changelog.md

@@ -26,6 +26,7 @@ Saves from 5.x are not compatible with 6.0.
 * **[Mission Generation]** Fixed an issue with SEAD missions flown by the AI when using the Skynet Plugin and anti-radiation missiles (ARM). The AI now correctly engages the SAM when it comes alive instead of diving into it.
 * **[Mission Generation]** Fixed an issue where SEAD/DEAD/BAI flights fired all missiles / bombs against a single unit in a group instead of targeting the whole group.
 * **[Mission Generation]** Fixed adding additional mission types for a squadron causing error messages when the mission type is not supported by the aircraft type by default
+* **[Mission Generation]** AAA ground units now spawn correctly at the frontline
 * **[UI]** Fixed and issue where the liberation main exe was still running after application close.
 
 # 5.2.0

game/ground_forces/ai_ground_planner.py

@@ -119,7 +119,7 @@ class GroundPlanner:
             elif unit_class is UnitClass.ATGM:
                 collection = self.atgm_group
                 role = CombatGroupRole.ATGM
-            elif unit_class is UnitClass.SHORAD:
+            elif unit_class in [UnitClass.SHORAD, UnitClass.AAA]:
                 collection = self.shorad_groups
                 role = CombatGroupRole.SHORAD
             elif unit_class is UnitClass.RECON:

resources/units/ground_units/2S6 Tunguska.yaml

@@ -1,4 +1,4 @@
-class: AAA
+class: SHORAD
 description: "The 2K22 Tunguska (Russian: 2\u041A22 '\u0422\u0443\u043D\u0433\u0443\
   \u0441\u043A\u0430') is a Russian tracked self-propelled anti-aircraft weapon armed\
   \ with a surface-to-air gun and missile system. It is designed to provide day and\