Make plugin option values publicly settable (#413)

Author: mslukebo

src/Microsoft.Performance.SDK/Options/PluginOption.cs

@@ -50,12 +50,12 @@ private protected  PluginOption()
     ///     value it was set to. This means that this value will be <c>false</c> even if the option's value is
     ///     manually set to its default value.
     /// </summary>
-    internal bool IsUsingDefault { get; private protected set; }
+    public bool IsUsingDefault { get; private protected set; }
 
     /// <summary>
     ///     Applies the default value to this option.
     /// </summary>
-    internal abstract void ApplyDefault();
+    public abstract void ApplyDefault();
 
     /// <summary>
     ///     Raises the <see cref="OptionChanged"/> event.

src/Microsoft.Performance.SDK/Options/PluginOption`1.cs

@@ -51,7 +51,7 @@ public T CurrentValue
         {
             return this.currentValue;
         }
-        internal set
+        set
         {
             this.IsUsingDefault = isApplyingDefault;
 
@@ -61,7 +61,7 @@ internal set
     }
 
     /// <inheritdoc />
-    internal override void ApplyDefault()
+    public override void ApplyDefault()
     {
         this.isApplyingDefault = true;
         this.CurrentValue = this.DefaultValue;