Fixed GROUP:IsAlive() returning true even if all group members aredead

Fixed the mechanism by checking if the group has a :getUnit(1) ~= nil

Moose Test Missions/GRP - Group Commands/GRP-100 - IsAlive/GRP-100 - IsAlive.lua

@@ -0,0 +1,32 @@
+---
+-- Name: GRP-100 - IsAlive
+-- Author: FlightControl
+-- Date Created: 23 Feb 2017
+--
+-- # Situation:
+--
+-- This test is about checking if IsAlive on GROUP level is working correctly.
+-- Two ground forces GROUPS are shooting each other.
+-- Check the IsAlive status in the logging of the survivor and the defeat.
+-- 
+-- # Test cases:
+-- 
+-- 1. Observe the IsAlive statuses in the dcs.log file.
+
+
+
+--Create Spawn Groups
+local GroupBlue = GROUP:FindByName( "Blue" )
+local GroupRed = GROUP:FindByName( "Red" )
+
+local Schedule, ScheduleID = SCHEDULER:New( nil,
+  --- Variable Declarations
+  -- @param Wrapper.Group#GROUP GroupBlue
+  -- @param Wrapper.Group#GROUP GroupRed
+  function( GroupBlue, GroupRed )
+    local IsAliveBlue = GroupBlue:IsAlive()
+    local IsAliveRed = GroupRed:IsAlive()
+    BASE:E( { IsAliveBlue = IsAliveBlue, IsAliveRed = IsAliveRed } )
+  end, { GroupBlue, GroupRed }, 1, 1 
+)
+