add longest_allowable_sleep_time to config.json and add config to sleephelper constructor

Author: blakejameson

config.json

@@ -53,6 +53,7 @@
 "battery_voltage": 5.2,
 "current_draw": 240.5,
 "reboot_time": 3600,
+"longest_allowable_sleep_time": 600,
 "turbo_clock": false,
 "radio": {
     "license": "",

main.py

@@ -96,7 +96,7 @@
 
     c = Satellite(logger, config)
 
-    sleep_helper = SleepHelper(c, logger, watchdog)
+    sleep_helper = SleepHelper(c, logger, watchdog, config)
 
     cdh = CommandDataHandler(config, logger, radio)
 
@@ -147,7 +147,8 @@ def send_imu_data():
 
     def main():
         f.beacon()
-
+        sleep_helper.safe_sleep(16)
+        sleep_helper.safe_sleep(100)
         f.listen_loiter()
 
         f.state_of_health()