Added attack cooldowns to a few objects

Includes:
-Fire axe cabinets
-Captain's display case
-RD's lab cage
-Added cooldowns to turrets. AIs rejoice!
-Added attack cooldown for space vines and simple animals
-Reduced some duplicate code in constructs.dm
Extra period
Merge branch 'master' of https://github.com/NTStation/NTstation13 into casecooldown
Merge branch 'casecooldown' of https://github.com/Ikarrus/NTstation13 into casecooldown
Merge pull request #545 from Ikarrus/casecooldown

Added attack cooldowns to some objects