At the end of this task bigtable::Table will provide an Apply() member function to apply mutations to a single row. The member functions should:

• Use the policies in effect to retry any recoverable RPC failures (Add policy to control how does the Table class backoff on RPC failures #14)
• Use the policies in effect to determine if a mutation is idempotent (Implement a policy to control which mutations are idempotent #13)
• Report an error when the operation fails after the policies "give up" (Add policy to control when the Table class stops retrying #16)