Lower async-http-client version dependency and move it to maven property
Lower async-http-client version dependency and move it to maven property

RB=664848
G=thirdeye-dev-reviewers
R=kgopalak,npawar,nprabhak
A=kgopalak

tkao1000/pinot,tkao1000/pinot,fx19880617/pinot-1,sajavadi/pinot,tkao1000/pinot,apucher/pinot,linkedin/pinot,apucher/pinot,sajavadi/pinot,fx19880617/pinot-1,linkedin/pinot,sajavadi/pinot,linkedin/pinot,linkedin/pinot,apucher/pinot,tkao1000/pinot,fx19880617/pinot-1,fx19880617/pinot-1,sajavadi/pinot,linkedin/pinot,fx19880617/pinot-1,apucher/pinot,apucher/pinot,tkao1000/pinot,sajavadi/pinot