Retry log upload to swift
Retry log upload to swift

Retry 3 times to help with network failures.

Change-Id: Ia0a065c5b4343dd922b2af8cc29387384cdefe82

Tesora/tesora-project-config,dongwenjuan/project-config,openstack-infra/project-config,noorul/os-project-config,noorul/os-project-config,citrix-openstack/project-config,Tesora/tesora-project-config,anbangr/osci-project-config,dongwenjuan/project-config,coolsvap/project-config,citrix-openstack/project-config,coolsvap/project-config,anbangr/osci-project-config,openstack-infra/project-config