Fix comment handling in test file parser
Fix comment handling in test file parser

The test file parser is supposed to handle multiple-item comments for a
section. The implementation had an issue were only single-item comments
were handled correctly.

Change-Id: I47f7201044f6f92d10a62bb9d2eada1bd4c47a23
Reviewed-on: http://gerrit.cloudera.org:8080/1819
Reviewed-by: Lars Volker <4d73c29a4561048ce85fa0051bb7a6d201781159@cloudera.com>
Tested-by: Internal Jenkins

kapilrastogi/Impala,kapilrastogi/Impala,kapilrastogi/Impala,kapilrastogi/Impala,kapilrastogi/Impala,kapilrastogi/Impala,kapilrastogi/Impala