Ignore test and proprietary files (#5933)

Author: jrcain-usgs

.gitignore

@@ -107,4 +107,13 @@ Temporary Items
 .idea
 
 # Ignore coverage output 
-errors.txt
+errors.txt
+
+# Ignore test output
+isis/src/**/output/*.txt
+isis/src/**/output/*.pvl
+isis/src/**/output/*.csv
+isis/tests/data/isisimport/pds4.xml
+
+# Ignore the local copy of kakadu
+recipe/kakadu/kakadu_7_9.zip