Security update for php7 (moderate)

This update for php7 fixes the following issues:

This security issue was fixed:

• CVE-2018-17082: The Apache2 component in PHP allowed XSS via the body of
  a "Transfer-Encoding: chunked" request, because the bucket brigade was
  mishandled in the php_handler function (bsc#1108753)

This non-security issue was fixed:

• reenable php7-dba support of Berkeley DB (bsc#1108554)

This update was imported from the SUSE:SLE-15:Update update project.