Description of problem:
Executing "hammer role filters" command throws SQL errors

Version-Release number of selected component (if applicable):
foreman-1.7.2.46-1.el7sat.noarch
foreman-compute-1.7.2.46-1.el7sat.noarch
foreman-debug-1.7.2.46-1.el7sat.noarch
foreman-gce-1.7.2.46-1.el7sat.noarch
foreman-libvirt-1.7.2.46-1.el7sat.noarch
foreman-ovirt-1.7.2.46-1.el7sat.noarch
foreman-postgresql-1.7.2.46-1.el7sat.noarch
foreman-proxy-1.7.2.6-1.el7sat.noarch
foreman-selinux-1.7.2.16-1.el7sat.noarch
foreman-vmware-1.7.2.46-1.el7sat.noarch
ruby193-rubygem-foreman_bootdisk-4.0.2.13-1.el7sat.noarch
ruby193-rubygem-foreman_discovery-2.0.0.19-1.el7sat.noarch
ruby193-rubygem-foreman_docker-1.2.0.24-1.el7sat.noarch
ruby193-rubygem-foreman_gutterball-0.0.1.9-1.el7sat.noarch
ruby193-rubygem-foreman_hooks-0.3.7-2.el7sat.noarch
ruby193-rubygem-foreman-redhat_access-0.2.3-1.el7sat.noarch
ruby193-rubygem-foreman-tasks-0.6.15.7-1.el7sat.noarch
rubygem-hammer_cli-0.1.4.13-1.el7sat.noarch
rubygem-hammer_cli_foreman-0.1.4.14-1.el7sat.noarch
rubygem-hammer_cli_foreman_bootdisk-0.1.2.7-1.el7sat.noarch
rubygem-hammer_cli_foreman_discovery-0.0.1.10-1.el7sat.noarch
rubygem-hammer_cli_foreman_docker-0.0.3.9-1.el7sat.noarch
rubygem-hammer_cli_foreman_tasks-0.0.3.5-1.el7sat.noarch
rubygem-hammer_cli_gutterball-0.0.1.3-1.el7sat.noarch
rubygem-hammer_cli_import-0.10.20-1.el7sat.noarch
rubygem-hammer_cli_katello-0.0.7.18-1.el7sat.noarch


How reproducible:
100 %

Steps to Reproduce:
1. Execute hammer role filters
     
# hammer role filters
PGError: ERROR:  invalid input syntax for integer: ""
LINE 1: ..."id" = "filters"."role_id" WHERE (("roles"."id" = '')) ORDER...
                                                             ^
: SELECT  "filters"."id" AS t0_r0, "filters"."search" AS t0_r1, "filters"."role_id" AS t0_r2, "filters"."created_at" AS t0_r3, "filters"."updated_at" AS t0_r4, "filters"."taxonomy_search" AS t0_r5, "roles"."id" AS t1_r0, "roles"."name" AS t1_r1, "roles"."builtin" AS t1_r2, "roles"."permissions" AS t1_r3 FROM "filters" LEFT OUTER JOIN "roles" ON "roles"."id" = "filters"."role_id" WHERE (("roles"."id" = '')) ORDER BY role_id, filters.id LIMIT 20 OFFSET 0

Actual results:
Throws SQL errors when executing the command

Expected results:
Ideally it should display a warning stating that ID of the role is missing

Additional info:
"hammer role filters" command is expecting an ID to be passed in with the command, if it finds NULL then it throws the above SQL error. 

  # hammer role list
---|-----------------------
ID | NAME                  
---|-----------------------
1  | Discovery Reader      
2  | Discovery Manager     
3  | Tasks Manager         
4  | Tasks Reader          
5  | Red Hat Access Logs   
6  | Access Insights Viewer
7  | Access Insights Admin 
8  | Boot disk access      
9  | Manager               
10 | Edit partition tables 
11 | View hosts            
12 | Edit hosts            
13 | Viewer                
14 | Site manager          
15 | Default user          
16 | Anonymous             
17 | Admin                 
---|-----------------------

  # hammer role filter --id 1 ---> This command works fine
---|---------------|--------|------------|------------------|----------------------
ID | RESOURCE TYPE | SEARCH | UNLIMITED? | ROLE             | PERMISSIONS          
---|---------------|--------|------------|------------------|----------------------
1  | Location      | none   | yes        | Discovery Reader | view_locations       
2  | Organization  | none   | yes        | Discovery Reader | view_organizations   
3  | Host          | none   | yes        | Discovery Reader | view_discovered_hosts
4  | DiscoveryRule | none   | yes        | Discovery Reader | view_discovery_rules 
---|---------------|--------|------------|------------------|----------------------