python3: more 2 to 3 tool fixes

Changes exception statements to match python 3 style

partial: https://github.com/vmware/pyvmomi/issues/55

pyVim/connect.py

@@ -307,7 +307,7 @@ def __Login(host, port, user, pwd, service, adapter, version, path,
       content = si.RetrieveContent()
    except vmodl.MethodFault:
       raise
-   except Exception, e:
+   except Exception as e:
       # NOTE (hartsock): preserve the traceback for diagnostics
       # pulling and preserving the traceback makes diagnosing connection
       # failures easier since the fault will also include where inside the

pyVmomi/SoapAdapter.py

@@ -1513,7 +1513,7 @@ class SessionOrientedStub(StubAdapterBase):
                time.sleep(self.retryDelay)
             retriesLeft -= 1
             continue
-         except Exception, e:
+         except Exception as e:
             if isinstance(e, self.SESSION_EXCEPTIONS):
                # Our session might've timed out, change our state and retry.
                self._SetStateUnauthenticated()