refactor(server): allow TinkerPop exceptions in Gremlin resp#2987

imbajin merged 2 commits intoapache:masterapache/hugegraph:masterfrom

utafrali:fix/issue-2986-bug-request-gremlin-exception-missingproutafrali/hugegraph:fix/issue-2986-bug-request-gremlin-exception-missingproCopy head branch name to clipboard