Advance conjunction Iterator for two phase iteration [LUCENE-9555]

[asfimport]

#10320 introduced a sort optimization where
documents can be skipped.
But there was a bug in case we were using two phase
approximation, as we would advance it without advancing
an overall conjunction iterator.

Relates to #10320

---

Migrated from LUCENE-9555 by Mayya Sharipova (@mayya-sharipova), updated Oct 06 2020
Pull requests: apache/lucene-solr#1943

[asfimport]

ASF subversion and git services (migrated from JIRA)

Commit 6ac94a6 in lucene-solr's branch refs/heads/master from Mayya Sharipova
https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=6ac94a6

LUCENE-9555: Advance conjunction Iterator for two phase iteration (#1943)

PR #1351 introduced a sort optimization where
documents can be skipped.
But there was a bug in case we were using two phase
approximation, as we would advance it without advancing
an overall conjunction iterator.

This patch fixed it.

Relates to #1351

[asfimport]

ASF subversion and git services (migrated from JIRA)

Commit e7bf2dc in lucene-solr's branch refs/heads/branch_8x from Mayya Sharipova
https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=e7bf2dc

LUCENE-9555: Advance conjunction Iterator for two phase iteration (#1943)

PR #1351 introduced a sort optimization where
documents can be skipped.
But there was a bug in case we were using two phase
approximation, as we would advance it without advancing
an overall conjunction iterator.

This patch fixed it.

Relates to #1351