Update ZICA_SEARCH_SOURCE.abap

- Get rid of exporting and changing parameters in methods
- Using a few more modern ABAP comands (i.e. to_upper instead of TRANSLATE <var> TO UPPER CASE)
- Get rid of [ ] to indicate internal tables
- Changes made in ABAP 731 SP11
Merge pull request #1 from zcust01/master

Update ZICA_SEARCH_SOURCE.abap