CLOUDSTACK-7246: corrected script name of createipalias

(cherry picked from commit 912dc15bc18a2482ff78fd2f1c19bd8e46c98bf1)

Conflicts:
	core/src/com/cloud/agent/resource/virtualnetwork/VRScripts.java
CLOUDSTACK-7246: corrected script name of createipalias

(cherry picked from commit 1bfb1f6503167c3de2c01894b32d287a98424dbc)