Connecticut Ballet will hold open auditions for children&rsquo;s roles in its upcoming production of the full-length ballet, &amp;#8220;The Sleeping Beauty,&amp;#8221; on Saturday, Aug. 28, from 2 to 5 p.m. at Connecticut Ballet Center, 20 Acosta St., Stamford. Rehearsals will&nbsp;begin in late August and the public performances at the Palace/Stamford Center for the Arts&nbsp;will be Oct. [...]