Declare variables for freeipa_setup.sh script

These were assumed to be always passed, but as the script gets
different cases (novajoin vs pre-defined service principals) we might
get "unbound variable" errors when used outside of CI. Exporting these
variables beforehand prevents that.

Change-Id: I195321354df167c09cfc87c5b9f86c6dc5026d75

ci/scripts/freeipa_setup.sh

@@ -22,6 +22,15 @@ elif [ -f "/tmp/freeipa-setup.env" ]; then
     source /tmp/freeipa-setup.env
 fi
 
+export Hostname=${Hostname:-""}
+export FreeIPAIP=${FreeIPAIP:-""}
+export DirectoryManagerPassword=${DirectoryManagerPassword:-""}
+export AdminPassword=${AdminPassword:-""}
+export UndercloudFQDN=${UndercloudFQDN:-""}
+export HostsSecret=${HostsSecret:-""}
+export ProvisioningCIDR=${ProvisioningCIDR:-""}
+export UsingNovajoin=${UsingNovajoin:-""}
+
 if [ -n "$ProvisioningCIDR" ]; then
     # Add address to provisioning network interface
     ip link set dev eth1 up