Remove Support for VixDiskLib 5.1.0

VixDiskLib 5.1.0 has a known bug intermittently causing a
segfault during disk open operations when the vCenter Server
does not provide an SSL thumbprint for the target host.  The
error depends upon the memory content.  This segfault has been
encountered during testing so support for this version has
been removed.  Only this version has this flaw.

Add capability to easily add other unsupported versions along
with a concise reason to be printed to the log.
no longer reference rmagick
Locate same named method, instances and classes across domains

    This feature allows the UI to display a list of overridden instances
    and methods from different domains. The functions return a list of
    classes, instances or methods ordered based on domain priority. The
    UI should be able to guide the end user to the highest priority
    classes, instances and methods
Merge pull request #310 from jerryk55/vddk_remove_5.1.0

Remove Support for VixDiskLib 5.1.0
Merge pull request #314 from kbrock/gemfile_rmagic_cleanup

no longer reference rmagick
Fixed the typo causing a Rbac issue in Hosts->Analyze & Check Compliance

Also applicable to #243
Updating REST API to v1.0
Get new method text from new miq_ae_method.default_method_text.

No longer using old default method text with started/ended logging.
Merge pull request #311 from tinaafitz/automate_new_method_text

Get new method text from new miq_ae_method.default_method_text.
Merge pull request #302 from mkanoor/homonymic_methods_classes

Retrieve same named method, instances and classes across domains
Merge pull request #316 from abellotti/rest_api_version_1_0

Updating REST API to v1.0
New method cloneable? to check if VMs/Templates can be cloned or not

issue #253
https://bugzilla.redhat.com/show_bug.cgi?id=1122712
REST API Support for Service Requests as subcollections

- Supporting /api/service_templates/#/service_requests
- Supporting /api/service_templates/#/service_requests/#
- Supporting /api/service_templates/#/service_requests/# --expand=request_tasks
- Supporting /api/service_requests/#/request_tasks (or tasks)
Merge pull request #287 from AparnaKarve/bz1122712_vm_clone_issue

Added a new method cloneable? to check if VMs/Templates can be cloned or not
Merge pull request #315 from AparnaKarve/hosts_analyze_chk_complaince_rbac_issue

Fixed the typo causing a Rbac issue in Hosts->Analyze & Check Compliance
Merge pull request #312 from abellotti/rest_api_service_requests_tasks

REST API Support for Service Requests as subcollections