ENYO-2806: create "project.json" file after being sure to get the template resources for the project creation

Related JIRA: https://enyojs.atlassian.net/browse/ENYO-2806

Insure that the template resources are well available (or that are not required) before generating the "project.json" file for the project creation

Checked on Windows 7 : Chrome

Enyo-DCO-1.1-Signed-off-by: Vincent HERILIER vincent.herilier@hp.com