Description of problem:
When adding a port to some bridge and pressing the tab for autocomplete, the ovs-vsctl throws an error. 




Version-Release number of selected component (if applicable):
[root@ovs ~]# ovs-vsctl --version
ovs-vsctl (Open vSwitch) 2.17.6
DB Schema 8.3.0

How reproducible:


Steps to Reproduce:
1. ovs-vsctl add-port mybridge 
2. *press tab*

Actual results:

[root@ovs ~]# ovs-vsctl add-port mybridge enp-bash: export: `BASH_FUNC_which%%': not a valid identifier
-bash: export: `${which_declare}': not a valid identifier
-bash: export: `)': not a valid identifier
-bash: export: `|': not a valid identifier
-bash: export: `/usr/bin/which': not a valid identifier
-bash: export: --: invalid option
export: usage: export [-fn] [name[=value] ...] or export -p
-bash: export: --: invalid option
export: usage: export [-fn] [name[=value] ...] or export -p
-bash: export: --: invalid option
export: usage: export [-fn] [name[=value] ...] or export -p
-bash: export: --: invalid option
export: usage: export [-fn] [name[=value] ...] or export -p
-bash: export: --: invalid option
export: usage: export [-fn] [name[=value] ...] or export -p
-bash: export: `$@': not a valid identifier
-bash: export: `}': not a valid identifier

Enter a new port:
[root@ovs ~]$ ovs-vsctl add-port mybridge enp^C



Expected results:


Additional info: