[Backport 7.9] - Search in the cms with an apostrophe ' gives a stacktrace and no results

When searching for a phrase with a single quote ' in the term in the cms then this gives an error with a stacktrace and no results.

Repoduction:

• login the cms
• search for any phrase with a single quote: for instance te'st
• see the following error (see attachment for complete stacktrace)

Error executing query[text]:
9c-a5d1-4e84-aec4-594e5bf93b25') and (jcr:contains(.,'te\'st') or jcr:contains(.,'te\'st*'))]/rep:excerpt(.) order by @jcr:score desc
[INFO] [talledLocalContainer] javax.jcr.query.InvalidQueryException: Encountered "\') or jcr:contains(.,\'" at line 1, column 126.

Fix:
The issue lies in the TextSearchBuilder that tries to escape single quotes via a backslash '\' thus ' becomes \'
According to JSR-170 spec v1.0, Sec. 6.6.4.9. single quotes need to be escaped via another single quote. Thus ' should become ''

Tested this fix via the repository and it works on the archetype of hippo 7.8.5

see the answer in: https://issues.apache.org/jira/browse/JCR-1748