Adds Scheduler Simulator Story as Draft

Adds a user story for a Scheduler Simulator to the draft folder

Change-Id: I215a05258bf2f4707b6d59ec5c760ef461c079eb

user-stories/draft/scheduler-simulator.rst

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+Scheduler Simulator
+==========================
+
+*Problem description*
+---------------------
+Cloud Operators are often confronted with the need to perform what if scenarios on
+proposed compute and block storage schedulers tweaks. As such they often want to
+have access to a scheduler simulator, to make a series of "virtual" requests given a
+specific scheduler configuration to see if the resulting virtual machine load
+matches their expected or desired outcome.
+
+User Stories
+------------
+*As a cloud operator, I want to be able to simulate my cloud's scheduler with a
+variety of virtual machine request loads under a given scheduler configuration in
+order to determine the optimal configuration for my desired outcome
+*As a cloud operator, I want to be able to visualize the simulated scheduling of
+virtual machines onto hosts in my environment so that I can quickly realize whether
+a given configuration will result in my desired outcome
+
+Usage Scenarios Examples
+------------------------
+1. Operator Runs Simulator
+	a. Operator defines scheduler configuration
+	b. Operator defines request load
+	c. Simulator places load on "virtual" cloud given configuration
+	d. Simulator provides results of that placement
+	e. Simulator provides visual output of placement
+	f. Operator determines if result is optimal and if not adjusts configuration
+
+Opportunity/Justification
+-------------------------
+This user story is valuable to cloud operators because it allows them to tune the
+scheduler without having to run the configurations in real world environments.
+
+Related User Stories
+--------------------
+None.
+
+*Requirements*
+--------------
+None.
+
+*Gaps*
+------
+None currently known.
+
+*Affected By*
+-------------
+None.
+
+*External References*
+---------------------
+None.