[SP-538] - apply formatting before back-port
[SP-358] - backport for PDI-5595 to 5.0

What was done
1) added unit tests for various time zone formats
2) added support for ISO-8601 format when Z is specified in date time
pattern
[SP-538] - backport for PDI-5595 to 5.0

What was done
1) changed offset -0000 to UTC timezone
[SP-538] - backport for PDI-5595 to 5.0

Changed default SalesForce format in order to make system properly treat
timezone coming from SF
This change affects UI only as previous commit contains fixed conversion
logic
Merge pull request #228 from mtseu/sp-538

Sp 538 - backport for 5595 to 5.0