Update LDAPConnection.java

[le-zell]

This PR to fix multiple issues on LDAP :

• fetch all members of a ldap group with 1500+ members (Active directory returns null values for groups with 1500+ members when we don't specfiy an attribute member like this : member;range=0-1500). The idea is to iterate multiple times to fetch n times all the members for the group

• binary attributes are not treat well by pentaho. so we pass by a data: base64 encoded string feed.

• the ldap upsert step doesn't remove the attribute that have NULL values

[buildguy]

:x: Build failed in 22m 36s

Build command:

mvn clean verify -B -e -Daudit -amd -pl engine

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:no_entry: Failed Tests

:cloud_with_lightning_and_rain: 2 test(s) failed:

org.pentaho.di.job.entries.getpop.MailConnectionTest.findValidTargetTest (click to expand)

Original file name should be tried first.

org.pentaho.di.www.RegisterPackageServletTest.testCopyAndClose (click to expand)

${result.errorDetails}

Tests run: 3121, Failures: 2, Skipped: 7    Test Results

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Errors:

Filtered log (click to expand)

script returned exit code 1

:information_source: This is an automatic message

[buildguy]

:x: Build failed in 2m 3s

Build command:

mvn clean verify -B -e -Daudit -amd -Djs.no.sandbox

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:exclamation: No tests found!

:information_source: This is an automatic message