* [PGPRO-5673] add missing grants (caused by CVE-2018-1058 fixes#415 PGPRO-5315)
* tests.backup.BackupTest.test_missing_replication_permission_1: fix test for changed 14s output
* tests.backup.BackupTest.test_missing_replication_permission: fix test for 9.5
* tests.checkdb.CheckdbTest.test_checkdb_with_least_privileges: remove grant for nonexistent (in 10) bt_index_check(regclass, bool)
* tests.checkdb.CheckdbTest.test_checkdb_with_least_privileges: remove grant for nonexistent (in 9.5) pg_catalog.pg_control_system()
* tests.checkdb.CheckdbTest.test_checkdb_with_least_privileges: remove grant for nonexistent (in amcheck_next) bt_index_check(regclass)
* adapt tests/restore.py to Python-3.5 (used in travis tests)
* skip issue_313 test
* tests: Introduced a new flag for tests -- PGPROBACKUP_GDB
* tests: Do travis builds with CFLAGS="-O0" (stabilization of gdb tests)
* tests: Run compatibility tests only if PGPROBACKUPBIN_OLD set
* tests: Running some tests now depends on PGPROBACKUP_SSH_REMOTE