Host test plugins: Bug-fix: Wrong variable was checked against None while readling line from serial port
Host test plugins: removed usused extra_baud parameter from serial port initialization
Host test plugins: moved program cycle sleep time to host_test - this delay is used to give time device to flash copied file
Host test plugins: Added prints to serial_init() function
Host test plugins: added custom serial port configuration, baudrate and timeout. This can now be done before host test will call run() function
Host test plugins: bug-fix: serial_timeout was used as function name and class member. Caused runtime script problem

Host test plugins: Increased test suite timeout on each test execution twice - for now, so tests do not timeout. TODO: exclude coopy and reset procedures from testcase timeout measurement