Add exception message in trial_keeper's rest util (#196)

* Print exception message for trial keeper rest utils

tools/trial_tool/rest_utils.py

@@ -27,7 +27,8 @@ def rest_get(url, timeout):
     try:
         response = requests.get(url, timeout=timeout)
         return response
-    except Exception:
+    except Exception as e:
+        print('Get exception {0} when sending http get to url {1}'.format(str(e), url))
         return None
 
 def rest_post(url, data, timeout):
@@ -36,7 +37,8 @@ def rest_post(url, data, timeout):
         response = requests.post(url, headers={'Accept': 'application/json', 'Content-Type': 'application/json'},\
                                  data=data, timeout=timeout)
         return response
-    except Exception:
+    except Exception as e:
+        print('Get exception {0} when sending http post to url {1}'.format(str(e), url))
         return None
 
 def rest_put(url, data, timeout):
@@ -45,7 +47,8 @@ def rest_put(url, data, timeout):
         response = requests.put(url, headers={'Accept': 'application/json', 'Content-Type': 'application/json'},\
                                 data=data, timeout=timeout)
         return response
-    except Exception:
+    except Exception as e:
+        print('Get exception {0} when sending http put to url {1}'.format(str(e), url))
         return None
 
 def rest_delete(url, timeout):
@@ -53,5 +56,6 @@ def rest_delete(url, timeout):
     try:
         response = requests.delete(url, timeout=timeout)
         return response
-    except Exception:
+    except Exception as e:
+        print('Get exception {0} when sending http delete to url {1}'.format(str(e), url))
         return None