micro_http: fix name of helper function in tests
micro_http: fix name of helper function in tests

Signed-off-by: Shion Yamashita <50e00973fce1d10fc27daa80d7755227d704de06@gmail.com>

firecracker-microvm/firecracker,firecracker-microvm/firecracker,firecracker-microvm/firecracker,firecracker-microvm/firecracker,firecracker-microvm/firecracker