driver: power: rest: raise error on power_set() if one occurred

Fixes: 2a8ac47 ("driver/power: add support for REST based relays controlling power")
Signed-off-by: Bastian Krause <bst@pengutronix.de>

Author: Bastian-Krause

labgrid/driver/power/rest.py

@@ -17,7 +17,8 @@
 def power_set(host, port, index, value):
     assert port is None
     value = b"1" if value else b"0"
-    requests.put(host.format(index=index), data=value)
+    r = requests.put(host.format(index=index), data=value)
+    r.raise_for_status()
 
 def power_get(host, port, index):
     assert port is None