Ensure that current uses of BaseException are required

* In some cases, it appears that Exception should have been used instead
  as there's no need to catch sys.exit KeyboardInterrupt and similar.
* In a few cases, it appears that BaseException is used because
  a library we depend on calls sys.exit() contrary to good coding
  design.  Comment those so that we know that those have been audited
  and found to be correct and change to use (Exception, SystemExit)
  instead.

lib/ansible/plugins/callback/logdna.py

@@ -84,12 +84,12 @@ def get_hostname():
 def get_ip():
     try:
         return socket.gethostbyname(get_hostname())
-    except BaseException:
+    except Exception:
         s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
         try:
             s.connect(('10.255.255.255', 1))
             IP = s.getsockname()[0]
-        except BaseException:
+        except Exception:
             IP = '127.0.0.1'
         finally:
             s.close()
@@ -101,7 +101,7 @@ def isJSONable(obj):
     try:
         json.dumps(obj, sort_keys=True, cls=AnsibleJSONEncoder)
         return True
-    except BaseException:
+    except Exception:
         return False
 
 
@@ -165,7 +165,7 @@ class CallbackModule(CallbackBase):
     def sanitizeJSON(self, data):
         try:
             return json.loads(json.dumps(data, sort_keys=True, cls=AnsibleJSONEncoder))
-        except BaseException:
+        except Exception:
             return {'warnings': ['JSON Formatting Issue', json.dumps(data, sort_keys=True, cls=AnsibleJSONEncoder)]}
 
     def flush(self, log, options):