Added sample model for Work Manager (#622)

* JIRA WDT-407 Added sample model for Work Manager

* JIRA WDT-407 Corrections from review

Author: rakillen

site/samples/samples.md

@@ -8,3 +8,4 @@ ${WDT_HOME}/bin/modelHelp.sh -oracle_home /tmp/oracle resources:/JDBCSystemResou
 ```
 ## Contents
 - [JDBC Sample](jdbc.md)
+- [Work Manager Sample](work_manager.md)

site/samples/work_manager.md

@@ -0,0 +1,63 @@
+## Work Manager Sample
+
+This WDT domain model sample section has typical configurations for a Work Manager and its related request classes and constraints. These elements are configured in the `SelfTuning` folder in the `resources` section of the model.
+```yaml
+resources:
+    SelfTuning:
+        Capacity:
+            capacity40:
+                Target: 'cluster-1'
+                Count: 40
+        MaxThreadsConstraint:
+            threeMax:
+                Target: 'cluster-1'
+                Count: 3
+        MinThreadsConstraint:
+            twoMin:
+                Target: 'cluster-1'
+                Count: 2
+        FairShareRequestClass:
+            appFairShare:
+                Target: 'cluster-1'
+                FairShare: 50
+            highFairshare:
+                Target: 'cluster-1'
+                FairShare: 80
+            lowFairshare:
+                Target: 'cluster-1'
+                FairShare: 20
+        ResponseTimeRequestClass:
+            fiveSecondResponse:
+                Target: 'cluster-1'
+                GoalMs: 5000
+        ContextRequestClass:
+            appContextRequest:
+                Target: 'cluster-1'
+                ContextCase:
+                    Case1:
+                        GroupName: Administrators
+                        RequestClassName: highFairshare
+                        Target: 'cluster-1'
+                    Case2:
+                        UserName: weblogic
+                        RequestClassName: lowFairshare
+                        Target: 'cluster-1'
+        WorkManager:
+            myWorkManager:
+                Capacity: capacity40
+                ContextRequestClass: appContextRequest
+                # FairShareRequestClass: appFairShare
+                IgnoreStuckThreads: true
+                MaxThreadsConstraint: threeMax
+                MinThreadsConstraint: twoMin
+                # ResponseTimeRequestClass: fiveSecondResponse
+                Target: 'cluster-1'
+```
+In this sample, assignments for `FairShareRequestClass` and `ResponseTimeRequestClass` are included as comments under `myWorkManager`. A Work Manager can only specify one request class type.
+
+There are additional sub-folders and attributes available for more configuration options. These can be determined using the [Model Help Tool](../model_help.md). For example, this command will list the attributes and sub-folders for the `WorkManager` folder:
+```yaml
+${WDT_HOME}/bin/modelHelp.sh -oracle_home /tmp/oracle resources:/WorkManager
+```
+
+For this sample, the target cluster `cluster-1` should be defined elsewhere within this model, or should already exist in a domain that is being updated.