tests: Bump boot default timeout

Starting the virtio device threads from the VMM thread has slowed down
the start of the VM when running on a highly contested system like the
CI.

Signed-off-by: Rob Bradford <[email protected]>

Author: rbradford

tests/integration.rs

@@ -53,7 +53,7 @@ mod tests {
 
     const DEFAULT_TCP_LISTENER_MESSAGE: &str = "booted";
     const DEFAULT_TCP_LISTENER_PORT: u16 = 8000;
-    const DEFAULT_TCP_LISTENER_TIMEOUT: i32 = 40;
+    const DEFAULT_TCP_LISTENER_TIMEOUT: i32 = 80;
 
     struct Guest<'a> {
         tmp_dir: TempDir,