Close http.Response.Body after Get request.
Close http.Response.Body after Get request.

From https://golang.org/pkg/net/http/#Get:
"When err is nil, resp always contains a non-nil resp.Body. Caller should close
resp.Body when done reading from it."

PiperOrigin-RevId: 219658052
Change-Id: I556e88ac4f2c90cd36ab16cd3163d1a52afc32b7

google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor