That's a false claim, Tesla never gave the GF3 cell supply contract to Panasonic. Here's the quote from the Q4 conference call:
Colin Langan
"And just as a follow-up. You commented that you expect China to be online by the end of the year, but there's a lot of articles that the battery supplier - you're looking at different battery suppliers. But, I mean, do you have a battery supplier? Because it seems kind of close to when production is supposed to start."
Elon Musk
"Well, there's really three things: the cell, the module and the pack. We will be making the module and the pack. So it's really just a question of cell supply. And we can essentially use any [high density] [ph] 2170 chemistry. And we expect to be a combination of cells produced at our Gigafactory in Nevada and cells produced in Japan and cells produced locally in China. And we feel confident to have a sufficient supply to hit the 3,000 units."
I.e. on January 30 Elon Musk already disclosed that Shanghai GF3 cell production will be served from GF1 initially, and from local sources of 2170 cell production.
TL;DR: You are just concern trolling.