PDI-4774 - Widget Disposed - Formula step

What was done:
1) added checks that widgets are not disposed
PDI-3499 - Insert update step throws exception when it contains a date field (Lazy Conversion of CSV file): Date<binary-string> : Unable to compare with value [Date]

Unit test
PDI-3499 - Insert update step throws exception when it contains a date field (Lazy Conversion of CSV file): Date<binary-string> : Unable to compare with value [Date]
PDI-10998 - Unable to save any changes to transformation with "Email Messages Input" step in PDI 5.1 if it was created in PDI 4.4
Cleanup GetXMLData
PDI-11122 - java.lang.ArrayIndexOutOfBoundsException with Get XML Data step
Merge branch 'PDI-10748' of git://github.com/kolinus/pentaho-kettle
PDI-10657 - Update DROOLS library to 5.5.0.

     * Updated Drools to 5.5.0.Final and fixed the required dependencies.
     * Removed OraBulkLoader dependency on Drools.
Merge branch 'master' of github.com:pentaho/pentaho-kettle
Merge pull request #191 from kolinus/PDI-4774

PDI-4774 - Widget Disposed - Formula step
Merge branch 'master' of github.com:pentaho/pentaho-kettle
Merge pull request #196 from pavel-sakun/PDI-3499

PDI-3499 - Insert update step throws exception when it contains a date field (Lazy Conversion of CSV file): Date<binary-string> : Unable to compare with value [Date]
Merge branch 'master' of github.com:pentaho/pentaho-kettle
Merge pull request #201 from pavel-sakun/PDI-10998

PDI-10998 - Unable to save any changes to transformation with "Email Messages Input" step in PDI 5.1 if it was created in PDI 4.4
PDI-10749 - Table Output step ignores Time zone for DATE datatype

New system variable KETTLE_COMPATIBILITY_DB_IGNORE_TIMEZONE has been added
for backward compatibility.
PDI-7118 - Cannot remove rules from Import rules dialog
Merge branch 'master' of github.com:pentaho/pentaho-kettle
PDI-10885 - Surround datafile name by single quotes
Merge pull request #209 from askdzmitry/PDI-10885

PDI-10885 - Surround datafile name by single quotes
Merge branch 'master' of github.com:pentaho/pentaho-kettle