increased test timeout to fix failing test due to slow sd card
increased test timeout to fix failing test due to slow sd card

mbedmicro/mbed,andcor02/mbed-os,mbedmicro/mbed,betzw/mbed-os,c1728p9/mbed-os,c1728p9/mbed-os,andcor02/mbed-os,betzw/mbed-os,kjbracey-arm/mbed,c1728p9/mbed-os,betzw/mbed-os,andcor02/mbed-os,andcor02/mbed-os,kjbracey-arm/mbed,mbedmicro/mbed,betzw/mbed-os,c1728p9/mbed-os,c1728p9/mbed-os,kjbracey-arm/mbed,andcor02/mbed-os,andcor02/mbed-os,c1728p9/mbed-os,kjbracey-arm/mbed,betzw/mbed-os,betzw/mbed-os,mbedmicro/mbed,mbedmicro/mbed