Dita vale fixes for OADP and AWS STS

Signed-off-by: Shruti Deshpande <shdeshpa@redhat.com>

_attributes/common-attributes.adoc

@@ -50,6 +50,7 @@ endif::[]
 :oadp-version-1-4: 1.4.5
 :oadp-version-1-5: 1.5.0
 :oadp-bsl-api: backupstoragelocations.velero.io
+:velero-link: link:https://{velero-domain}/docs/v{velero-version}/[Velero {velero-version}]
 :oc-first: pass:quotes[OpenShift CLI (`oc`)]
 :product-registry: OpenShift image registry
 :product-mirror-registry: Mirror registry for Red Hat OpenShift

backup_and_restore/application_backup_and_restore/aws-sts/oadp-aws-sts.adoc

@@ -6,7 +6,8 @@ include::_attributes/common-attributes.adoc[]
 
 toc::[]
 
-You install the {oadp-first} with {aws-first} by installing the OADP Operator. The Operator installs link:https://{velero-domain}/docs/v{velero-version}/[Velero {velero-version}].
+[role="_abstract"]
+You install the {oadp-first} with {aws-first} by installing the OADP Operator. The Operator installs {velero-link}.
 
 include::snippets/oadp-mtc-operator.adoc[]
 

modules/installing-oadp-aws-sts.adoc

@@ -6,6 +6,7 @@
 [id="installing-oadp-aws-sts_{context}"]
 = Installing the OADP Operator and providing the IAM role
 
+[role="_abstract"]
 AWS Security Token Service (AWS STS) is a global web service that provides short-term credentials for IAM or federated users. This document describes how to install {oadp-first} on an {aws-short} {sts-short} cluster manually.
 
 [IMPORTANT]

modules/oadp-setting-resource-limits-and-requests.adoc

@@ -45,7 +45,7 @@ spec:
 ----
 <1> Specify the node selector to be supplied to Velero podSpec.
 <2> The `resourceAllocations` listed are for average usage.
-
++
 [NOTE]
 ====
 Kopia is an option in OADP 1.3 and later releases. You can use Kopia for file system backups, and Kopia is your only option for Data Mover cases with the built-in Data Mover.

modules/preparing-aws-sts-credentials-for-oadp.adoc

@@ -6,6 +6,7 @@
 [id="preparing-aws-sts-credentials-for-oadp_{context}"]
 = Preparing AWS STS credentials for OADP
 
+[role="_abstract"]
 An {aws-full} account must be prepared and configured to accept an {oadp-first} installation. Prepare the {aws-short} credentials by using the following procedure.
 
 .Procedure