monitor.collect: Use UTC time for collector.db time queries

Collector db is fixed to store UTC times, so those promises need to follow.

slapos/monitor/collect.py

@@ -103,11 +103,11 @@ class ResourceCollect:
     if where != "":
       where = "and %s" % where
     if not date_scope:
-      date_scope = datetime.now().strftime('%Y-%m-%d')
+      date_scope = datetime.utcnow().strftime('%Y-%m-%d')
     if not min_time:
-      min_time = (datetime.now() - timedelta(minutes=1)).strftime('%H:%M:00')
+      min_time = (datetime.utcnow() - timedelta(minutes=1)).strftime('%H:%M:00')
     if not max_time:
-      max_time = (datetime.now() - timedelta(minutes=1)).strftime('%H:%M:59')
+      max_time = (datetime.utcnow() - timedelta(minutes=1)).strftime('%H:%M:59')
 
     columns = """count(pid), SUM(cpu_percent) as cpu_result, SUM(cpu_time),
                 MAX(cpu_num_threads), SUM(memory_percent), SUM(memory_rss), pid, SUM(io_rw_counter),
@@ -148,11 +148,11 @@ class ResourceCollect:
     if where != "":
       where = " and %s" % where
     if not date_scope:
-      date_scope = datetime.now().strftime('%Y-%m-%d')
+      date_scope = datetime.utcnow().strftime('%Y-%m-%d')
     if not min_time:
-      min_time = (datetime.now() - timedelta(minutes=1)).strftime('%H:%M:00')
+      min_time = (datetime.utcnow() - timedelta(minutes=1)).strftime('%H:%M:00')
     if not max_time:
-      max_time = (datetime.now() - timedelta(minutes=1)).strftime('%H:%M:59') 
+      max_time = (datetime.utcnow() - timedelta(minutes=1)).strftime('%H:%M:59') 
 
     colums = """count(pid), SUM(cpu_percent), SUM(cpu_time), SUM(cpu_num_threads), SUM(memory_percent), 
                 SUM(memory_rss), SUM(io_rw_counter), SUM(io_cycles_counter)"""  
@@ -272,7 +272,7 @@ def main():
 
   collector = ResourceCollect(parser.collector_db)
 
-  date_scope = datetime.now().strftime('%Y-%m-%d')
+  date_scope = datetime.utcnow().strftime('%Y-%m-%d')
   stat_info = os.stat(parser.output_folder)
   partition_user = pwd.getpwuid(stat_info.st_uid)[0]