Do not call into the VM unless the VM Context has been created.

[PiotrSikora]

Signed-off-by: John Plevyak [email protected]

[mandarjog]

@PiotrSikora real asan failure ?

==16==ERROR: AddressSanitizer: ABRT on unknown address 0x000000000010 (pc 0x7f4457cfb428 bp 0x7f4452e391d0 sp 0x7f4452e38e68 T253)
25468
#0 0x7f4457cfb427 in raise (/lib/x86_64-linux-gnu/libc.so.6+0x35427)
25469
#1 0x7f4457cfd029 in abort (/lib/x86_64-linux-gnu/libc.so.6+0x37029)
25470
#2 0x15f1a542 in Envoy::QueuedConnectionWrapper::QueuedConnectionWrapper(Envoy::Network::Connection&, bool)::'lambda'()::operator()() const /proc/self/cwd/./test/integration/fake_upstr

[jacob-delgado]

/retest