[SOMA-4165][SOMA-3997] Melhorar mensagem de tentativa de reconexão.

sga/client.lua

@@ -99,7 +99,8 @@ local Client = safer.readonly {
             }),
          })
          if not response then
-            self.logger:error(err)
+            err = err:gsub("^[^:]+:%d+: ", "")
+            self.logger:error("Unable to register to "..self.config.csbase_server..": "..err)
             self.logger:info("Will retry...")
             util_sleep(self.config.register_retry_s)
          end

sga/driver/posix.lua

@@ -39,7 +39,7 @@ function posix.execute_command(self, job, cmd_string, user_token)
       if not ok then
          local attr = lfs.attributes(sandbox_path)
          if not (attr and attr.mode == "directory") then
-            return nil, "Failed creating job's sandbox "..sandbox_path
+            return nil, "Failed creating job's sandbox "..sandbox_path..": "..err
          end
       end
    end