Once ntp is running we don't need cronjob

Once we sync the time with ntpdate at ntp install time, there is no need
anymore to run a cronjob to sync the time: that's ntp job.
Revert "Fixed typo."

This reverts commit 27bc9476619eda8f987050413f360b7e76603628.
This has its own pull request.
Revert "AC doesn't seem to be able to create monit cfgs"

This reverts commit 6352e639fb0b70ae080faade7ec2df517beb3030.
This has its own pull request.
Once ntp is running we don't need cronjob

Once we sync the time with ntpdate at ntp install time, there is no need
anymore to run a cronjob to sync the time: that's ntp job.
Merge branch 'system-ntp' of github.com:obino/appscale into system-ntp

Conflicts:
	appscale-progenitor.sh
Merge pull request #1465 from obino/system-ntp

Good job!