Rework the Flood firefight map "Desert Outpost" #1746

Job	Run time
code-tests (CODE)	4m 42s
code-tests (WEB)	3m 1s
map-tests (operation_trebuchet)	1m 56s
map-tests (slayer)	1m 45s
map-tests (firefight)	2m 12s
map-tests (crusade)	1m 43s
map-tests (stranded)	1m 52s
map-tests (first_contact)	2m 11s
map-tests (ks7_elmsville)	2m 10s
map-tests (ks7_elmsville_spaceodp)	2m 11s
map-tests (base_assault)	2m 8s
map-tests (base_assault_unsc_defend_vs_urf)	2m 13s
map-tests (unsc_achlys)	1m 58s
map-tests (base_assault_neutral_base)	2m 12s
map-tests (base_assault_neutral_base_taurus)	2m 12s
map-tests (geminus_city)	2m 9s
map-tests (geminus_city_urf_active)	2m 11s
map-tests (system_conquest)	2m 11s
	40m 57s

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