OpenShift cluster setup in new third party solutions section (#237)

* ocp folder

* WIP - first part of the README, Python script

* include boilerplate in Python script

* WIP - README

* README completed, tested

* top-level and section READMEs

* Update README.md

* mark yaml template as safe from boilerplate checks

* fix error in prepare script

* set a null default for the post bootstrap variable

* use count for consistency in all the bootstrap resources

* use index instead of element in bootstrap ig

README.md

@@ -20,6 +20,7 @@ Currently available examples:
 - **networking** - [hub and spoke via peering](./networking/hub-and-spoke-peering/), [hub and spoke via VPN](./networking/hub-and-spoke-vpn/), [DNS and Google Private Access for on-premises](./networking/onprem-google-access-dns/), [Shared VPC with GKE support](./networking/shared-vpc-gke/), [ILB as next hop](./networking/ilb-next-hop)
 - **data solutions** - [GCE/GCS CMEK via centralized Cloud KMS](./data-solutions/cmek-via-centralized-kms/), [Cloud Storage to Bigquery with Cloud Dataflow](./data-solutions/gcs-to-bq-with-dataflow/)
 - **cloud operations** - [Resource tracking and remediation via Cloud Asset feeds](.//cloud-operations/asset-inventory-feed-remediation), [Granular Cloud DNS IAM via Service Directory](./cloud-operations/dns-fine-grained-iam), [Granular Cloud DNS IAM for Shared VPC](./cloud-operations/dns-shared-vpc), [Compute Engine quota monitoring](./cloud-operations/quota-monitoring), [Scheduled Cloud Asset Inventory Export to Bigquery](./cloud-operations/scheduled-asset-inventory-export-bq)
+- **third party solutions** - [OpenShift cluster on Shared VPC](./third-party-solutions/openshift)
 
 For more information see the README files in the [foundations](./foundations/), [networking](./networking/), [data solutions](./data-solutions/) and [cloud operations](./cloud-operations/) folders.