lbaas/horizon - adds tcp protocol choice when create lb

This option was missed

Change-Id: I789c02a7679a160da9b3dc6551d18791a6085ebe
Closes-Bug: #1241713
Fix "it's vs. its" typos

Change-Id: Ib7914a7c0b6636599526d05bfb8bc2bcf3a79744
Closes-Bug: #1252838
Merge "Fix "it's vs. its" typos"
Merge "lbaas/horizon - adds tcp protocol choice when create lb"