Few UI fixes related to template, role & subnet.

Passed locally, looks to be random timing issues.
tests.foreman.ui.test_subnet.Subnet.test_create_subnet_1_1__applet_KiBcqQmD
tests.foreman.ui.test_products.Products.test_negative_create_4_1__xd3_xf8_xd1_xfb_xd9_xcb_xf9_xd8
tests.foreman.ui.test_products.Products.test_negative_update_1_1__xfa_xf9_xef_xed_xde_xec_xfd_xc2


bugzilla: '1123815' no longer valid.
tests.foreman.ui.test_subnet.Subnet.test_create_subnet_negative_1

Fixed for timing issues.
tests.foreman.ui.test_role.Role.test_update_role_org 
tests.foreman.ui.test_template.Template.test_negative_create_template_1

May be combine both the lines and write like this? (Matching the text from https://github.com/SatelliteQE/robottelo/blob/satellite-6.0.z.1/tests/foreman/cli/test_contentviews.py#L1078 for consistency)
```
@stubbed('Note: BZ 1123815 is fixed in upstream but not downstream')
```