wrong stat requirement on one of Annihilators talents

[astreoth]

"Lock on" the third talent of Annihilators artillery tree has "dex_steamreq_high4" instead of the dex_steamreq_high3 tthat the third talent in a tree should have.

also I saw orcs hold the ground racial get a bigger cooldown with more points invested should probably check that too

[GlassGo]

In 1.6.7 Lock On still has 22 lvl requirement when it should be 18.