Bug 534860 - (RHQ-1615) View results for Postgres invoke sql operation doesn't show results properly

Introduced a new "outputFormat" paramater for the "invokeSql" operation. Values may be "formattedText" or "html". Defaults to html (which was the only supported format before).

Formatted text prints tables like this (select id, uuid from rhq_resource limit 3) :

++++++++++++++++++++++++++++++++++++++++++++++++++++
+ id (int4) +            uuid (bpchar)             +
++++++++++++++++++++++++++++++++++++++++++++++++++++
+     10018 + eba7a118-4b46-4166-b391-7977b28e5f25 +
+     10722 + 94068e4c-1929-490c-ac8e-9d51a1a9f29c +
+     10002 + d2dbdbcb-d070-4682-b05a-2383f5d3395a +
++++++++++++++++++++++++++++++++++++++++++++++++++++