Complete non-issue. Ferrari would never order their top driver to finish second in the second race of the season. They have a clear 1st driver, 2nd driver policy, not the equal policy like RBR or McL where it is in the realm of possibility of asking someone like Vettel to finish behind other driver.
In fact, drivers like Vettel are the type that thrive the most in Ferrari style system.
How do you know?
Why did Red Bull issue the team order?
I have no doubt that Ferrari would also hold Alonso behind Massa on the last few laps of a race given both drivers are still fighting for the WDC. We saw that in 2010 (when Massa had the points) and we saw it in Australia where arguably Alonso lost the race win by being stuck behind Massa.
Some Vettel fans think he will go to Ferrari to be team boss. They are in for a rude awakening. The Ferrari car does not have the same downforce as the Red Bull, Alonso is not Webber and LDM is definitely not Horner.