SAM-2319: NumberFormatException for Item Analysis and Export

git-svn-id: https://source.sakaiproject.org/svn/sam/trunk@307722 66ffb92e-73f9-0310-93c1-f5514f145a0a
SAM-2295: Validation issues when answering an EMI question

git-svn-id: https://source.sakaiproject.org/svn/sam/trunk@307723 66ffb92e-73f9-0310-93c1-f5514f145a0a
SAM-2305: Availability and Submissions needs to be condensed

git-svn-id: https://source.sakaiproject.org/svn/sam/trunk@307724 66ffb92e-73f9-0310-93c1-f5514f145a0a