gnucash maint: Multiple changes pushed

[Christopher Lam]

Updated	 via  https://github.com/Gnucash/gnucash/commit/0c433e02 (commit)
	 via  https://github.com/Gnucash/gnucash/commit/e654bd34 (commit)
	 via  https://github.com/Gnucash/gnucash/commit/57f291af (commit)
	 via  https://github.com/Gnucash/gnucash/commit/75d5d810 (commit)
	from  https://github.com/Gnucash/gnucash/commit/8adcacbd (commit)



commit 0c433e02f7d0003c10e1244f572d0a9badd46e33
Author: Christopher Lam <christopher.lck at gmail.com>
Date:   Fri Jul 19 02:15:13 2019 +0800

    [business-core] deprecate gnc:entry-type-percent-p
    
    This function is only used once. deprecate it.

commit e654bd34af64235b5f9ac0dd8a05f6db9d8c912b
Author: Christopher Lam <christopher.lck at gmail.com>
Date:   Fri Jul 19 02:24:45 2019 +0800

    [business-core] simplify functions

commit 57f291af861d6ab7a15e633acf70e890d282b043
Author: Christopher Lam <christopher.lck at gmail.com>
Date:   Fri Jul 19 00:03:27 2019 +0800

    [test-business-core] initial commit

commit 75d5d8106b37e3a666355c18cf8ded0f201d8027
Author: Christopher Lam <christopher.lck at gmail.com>
Date:   Sun Jul 14 21:20:52 2019 +0800

    [report-utilities] fix gnc:strify
    
    Try monetary-collector and value-collector printers earlier; output is
    fixed and will be "coll<([$200.00])>" for commodity-collectors or
    "coll<23>" for value-collectors



Summary of changes:
 gnucash/report/business-reports/invoice.scm        |   2 +-
 gnucash/report/report-system/report-utilities.scm  |  17 +-
 .../report-system/test/test-report-utilities.scm   |  22 +-
 libgnucash/engine/business-core.scm                |  46 ++---
 libgnucash/engine/test/CMakeLists.txt              |   5 +
 .../engine/test/test-business-core.scm             | 222 ++++++++-------------
 6 files changed, 140 insertions(+), 174 deletions(-)
 copy gnucash/report/business-reports/test/test-owner-report.scm => libgnucash/engine/test/test-business-core.scm (65%)