fix the issue with logs and table visualzation in dashboards#19

hengfeiyang merged 2 commits intoopenobserve:mainopenobserve/openobserve-grafana-plugin:mainfrom

kcrandall:fix/log_visulization_not_workingkcrandall/openobserve-grafana-plugin:fix/log_visulization_not_workingCopy head branch name to clipboard