Fix creation of RE_ENV file
Fix creation of RE_ENV file

This change fixes the RE_ENV file so that the environment variables
defined have values that are quoted. So for example without this fix,
`export RE_FOO_BAR=foo bar` is added to the file and when exported that
gives `RE_FOO_BAR=foo`. With this change it would become `export
RE_FOO_BAR='foo bar'` which gives `RE_FOO_BAR=foo bar`.

This address an issue missed by
bb5584a4bb463b1bf1b299e25b07a9eb82f454e8.

JIRA: RE-1798

BjoernT/rpc-openstack,rcbops/rpc-openstack,jacobwagner/rpc-openstack,rcbops/rpc-openstack,jacobwagner/rpc-openstack,BjoernT/rpc-openstack