We should only WARN on http codes we intend to retry on

[northrup]

This PR stops us from emitting ERROR when we receive http codes that we intend on retrying.

[jar349]

regarding the acceptance test failure:

ldap-server-1  | cp: can't create '/container/service/slapd/assets/certs/ldap.key': No such file or directory
ldap-server-1  | cp: can't create '/container/service/slapd/assets/certs/ldap.crt': No such file or directory
ldap-server-1  | cp: can't create '/container/service/slapd/assets/certs/ca.crt': No such file or directory
ldap-server-1  | cp: can't create '/container/service/slapd/assets/certs/dhparam.pem': No such file or directory
ldap-server-1  | chown: /container/service/slapd/assets/certs: No such file or directory
ldap-server-1  | cp: can't create '/container/environment/99-default/default.startup.yaml': No such file or directory
ldap-server-1  | cp: can't create '/container/environment/99-default/default.yaml': No such file or directory
ldap-server-1  | cp: can't create '/etc/ldap/schema/README': No such file or directory
ldap-server-1  | cp: can't create '/etc/ldap/schema/collective.ldif': No such file or directory
ldap-server-1  | cp: can't create '/etc/ldap/schema/corba.ldif': No such file or directory
ldap-server-1  | cp: can't create '/etc/ldap/schema/core.ldif': No such file or directory
ldap-server-1  | cp: can't create '/etc/ldap/schema/cosine.ldif': No such file or directory
ldap-server-1  | cp: can't create '/etc/ldap/schema/dhcp.ldif': No such file or directory
ldap-server-1  | cp: can't create '/etc/ldap/schema/dnszone.ldif': No such file or directory
ldap-server-1  | cp: can't create '/etc/ldap/schema/duaconf.ldif': No such file or directory
ldap-server-1  | cp: can't create '/etc/ldap/schema/dyngroup.ldif': No such file or directory
ldap-server-1  | cp: can't create '/etc/ldap/schema/githubiam.ldif': No such file or directory
ldap-server-1  | cp: can't create '/etc/ldap/schema/inetorgperson.ldif': No such file or directory
ldap-server-1  | cp: can't create '/etc/ldap/schema/java.ldif': No such file or directory
ldap-server-1  | cp: can't create '/etc/ldap/schema/misc.ldif': No such file or directory
ldap-server-1  | cp: can't create '/etc/ldap/schema/nis.ldif': No such file or directory
ldap-server-1  | cp: can't create '/etc/ldap/schema/nssldap.ldif': No such file or directory
ldap-server-1  | cp: can't create '/etc/ldap/schema/openldap.ldif': No such file or directory
ldap-server-1  | cp: can't create '/etc/ldap/schema/pmi.ldif': No such file or directory
ldap-server-1  | cp: can't create '/etc/ldap/schema/postfix.ldif': No such file or directory
ldap-server-1  | cp: can't create '/etc/ldap/schema/ppolicy.ldif': No such file or directory
ldap-server-1  | cp: can't create '/etc/ldap/schema/puppet.ldif': No such file or directory
ldap-server-1  | cp: can't create '/etc/ldap/schema/sshaccount.ldif': No such file or directory
ldap-server-1  | cp: can't create '/etc/ldap/schema/sudoers.ldif': No such file or directory
ldap-server-1  | cp: can't create '/container/service/slapd/assets/config/bootstrap/ldif': No such file or directory
ldap-server-1  | nohup: can't execute '/usr/bin/python': No such file or directory