Take minutes and seconds off auto-version

1-hour resolution is enough to make this unique for our planned
purposes, and keeps this from being too long. Once testing is completed
can probably drop the hour too and just go with a 1-day version.

build.py

@@ -417,6 +417,6 @@ except IndexError:
     bvers = None
 
 if jvers == "master":
-    jvers = datetime.now().strftime("%Y%m%d%H%M%S")
+    jvers = datetime.now().strftime("%Y%m%d%H")
 
 configurations[btype]['def'](jvers, btype, barch, bvers)