Allow performing operations on Instances of a chosen Network Router

[hstastna]

Issue: #6309

This PR fixes the issue regarding Instances displayed through a Network Router's Relationships: nothing happened in the UI for almost all of the operations in the toolbar (tagging and comparing Instances worked).

The logic for operations on nested list of Instances was missing, in network_router controller. I'm adding appropriate logic by using button method from GenericButtonMixin.

In this PR, I'm also adding missing routes for managing policies of selected Instances.

Also Check Compliance of Last Known Configuration on Instances of a chosen Network Router will be working after merging this PR together with #6426 (MERGED).

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What else needs to be fixed:

• missing Submit and Cancel buttons for Evacuate selected Instances operation. But at least, the operation now finally works with this PR, regarding Instances and network_router controller. The issue regarding buttons will be fixed in another PR. More: No Submit, Cancel buttons for Evacuate selected Instances in a nested list #6480
• Resume Power operation on Instances displayed in a list (no matter if nested list or not, no matter which screen or controller). Issue: Nothing in the UI for Resume operation for Instances in the list #6487
• Shelve Offload Power operation on Instances displayed in a nested list (no matter which screen or controller). Nothing happens in the UI. Issue: Nothing in the UI for Shelve Offload operation for Instances in a nested list #6489

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Before: (SmartState Analysis, nothing happens in the UI)

After: (SSA successfully initiated for selected Instance)

[hstastna]

@miq-bot add_label bug

[martinpovolny]

The code looks great. I love the new tests.

@ZitaNemeckova : will you have the capacity to test this in the UI, please?

[ZitaNemeckova]

@hstastna I tried to combine this with #6426 and do Check Compliance of Last Known Configuration for a checked Instance in nested view of a Network Router. And it's not working for me.

[----] F, [2019-12-13T10:33:45.028766 #1808:3fd18abe4f38] FATAL -- : Error caught: [NoMethodError] undefined method `validate_check_compliance_queue' for #<ManageIQ::Providers::Openstack::CloudManager::Vm:0x00007fa2f0d0b3b8>
Did you mean?  validates_acceptance_of
/Users/zita/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/activemodel-5.1.7/lib/active_model/attribute_methods.rb:432:in `method_missing'
/ManageIQ/manageiq/app/models/mixins/availability_mixin.rb:24:in `is_available?'
/ManageIQ/manageiq-ui-classic/app/helpers/application_helper.rb:203:in `block in records_support_feature?'
/ManageIQ/manageiq-ui-classic/app/helpers/application_helper.rb:199:in `find'
/ManageIQ/manageiq-ui-classic/app/helpers/application_helper.rb:199:in `records_support_feature?'
/ManageIQ/manageiq-ui-classic/app/controllers/application_controller/ci_processing.rb:603:in `generic_button_operation'
/ManageIQ/manageiq-ui-classic/app/controllers/application_controller/ci_processing.rb:403:in `check_compliance_vms'
/ManageIQ/manageiq-ui-classic/app/controllers/application_controller/ci_processing.rb:935:in `process_vm_buttons'

[hstastna]

@ZitaNemeckova Thank you very much. I will check it. Maybe some more changes will be required to make.

[hstastna]

@ZitaNemeckova Now I see, what caused the problem. I forgot to update another PR and to add here network_router controller (as well as security_group).

[ZitaNemeckova]

Fixed 👍

Tested in UI. LGTM 👍

[miq-bot]

Checked commits hstastna/manageiq-ui-classic@c4dcc51~...ee25758 with ruby 2.5.5, rubocop 0.69.0, haml-lint 0.20.0, and yamllint 1.10.0
4 files checked, 0 offenses detected
Everything looks fine. 👍