stats: Plumb through symbol tables everywhere. Pulled from #6161.#6299

Merged

jmarantz merged 8 commits intoenvoyproxy:masterfrom

jmarantz:symtab-plumbing

Mar 19, 2019

Commits on Mar 15, 2019

Commits on Mar 18, 2019

Commits on Mar 19, 2019

Remove server().symbolTable() -- it should be obtained from server().stats().symbolTable().
jmarantz
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Merge branch 'master' into symtab-plumbing
jmarantz
committed