RUBY-266 - expose execution profiles through cluster object

* Minor tweaks to make generated docs cleaner.

Author: stamhankar999

lib/cassandra/cluster.rb

@@ -161,9 +161,16 @@ def protocol_version
       @connection_options.protocol_version
     end
 
+    # @param name [String] Name of profile to retrieve
+    # @return [Cassandra::Execution::Profile] execution profile of the given name
+    def execution_profile(name)
+      @profile_manager.profiles[name]
+    end
+
     # @return [Hash<String, Cassandra::Execution::Profile>] the collection of execution profiles
     def execution_profiles
-      @profile_manager.profiles
+      # Return a dup of the hash to prevent the user from adding/removing profiles from the profile-manager.
+      @profile_manager.profiles.dup
     end
 
     # @!method refresh_schema_async
@@ -288,12 +295,6 @@ def close
       close_async.get
     end
 
-    # @param name [String] Name of profile to retrieve
-    # @return [Cassandra::Execution::Profile] execution profile of the given name.
-    def execution_profile(name)
-      @profile_manager.profiles[name]
-    end
-
     # @private
     def inspect
       "#<#{self.class.name}:0x#{object_id.to_s(16)} " \

lib/cassandra/execution/profile_manager.rb

@@ -59,7 +59,6 @@ def distance(host)
 
       # NOTE: It's only safe to call add_profile when setting up the cluster object. In particular,
       # this is only ok before calling Driver#connect.
-      # @private
       def add_profile(name, profile)
         @profiles[name] = profile
         @load_balancing_policies << profile.load_balancing_policy if profile.load_balancing_policy