minimal set of changes to remove segfault in GCE / GCS (direct or via SD )...

minimal set of changes to remove segfault in GCE / GCS (direct or via SD ) segfaults, missing Bearer scheme on service calls Authorization headers
3 jobs for !34 with slb/al/fix-auth-lack-of-bearer-scheme-on-authorization-headers-and-segfault-everywhere-on-gce in 18 minutes and 14 seconds (queued for 1 second)
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