enable http integration for APM
enable http integration for APM

closes APM-28
flag = none

test plan:
  * canvas succeeds in booting
  * telemetry from http integrations like PV4 get
    noticed in datadog APM

Change-Id: I52d27cddacd80c3affcca75c53041dbdbd644d01
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/231588
Reviewed-by: Kevin Wright <034be954da7c8ad2ffb314deac91c21ad5265a39@instructure.com>
Reviewed-by: David Warkentin <90ca1b0e0b58a49360bffc4d17f5a010b12c3f2a@instructure.com>
QA-Review: Simon Williams <088e16a1019277b15d58faf0541e11910eb756f6@instructure.com>
Product-Review: Simon Williams <088e16a1019277b15d58faf0541e11910eb756f6@instructure.com>
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>

sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,sfu/canvas-lms