**Supplementary Materials:** Supplementary materials can be found at http://www.mdpi.com/1422-0067/21/2/656/s1.

**Author Contributions:** Conceptualization, K.S.; data curation, M.J.K., N.N., T.P., W.C., J.-H.Y., D.R.N. and K.S.; formal analysis, M.J.K., N.N., T.P., W.C., J.-H.Y., D.R.N. and K.S.; funding acquisition, K.S.; investigation, M.J.K., N.N., T.P., W.C., J.-H.Y., D.R.N. and K.S.; methodology, M.J.K., N.N., T.P., W.C., J.-H.Y., D.R.N. and K.S.; project administration, K.S.; resources, K.S.; supervision, K.S.; validation, M.J.K., N.N., T.P., W.C., J.-H.Y., D.R.N. and K.S.; visualization, M.J.K., N.N., T.P., W.C., J.-H.Y., D.R.N. and K.S.; writing—original draft, M.J.K., N.N., T.P., W.C., J-H.Y., D.R.N. and K.S.; writing—review and editing, W.C., J.-H.Y., D.R.N. and K.S. All authors have read and agreed to the published version of the manuscript.

**Funding:** Khajamohiddin Syed expresses sincere gratitude to the University of Zululand Research Committee for funding (Grant No. C686) and to the National Research Foundation (NRF), South Africa for a research grant (Grant No. 114159). Honours students, Makhosazana Jabulile Khumalo (HBG181018376835), Nomfundo Nzuza (MND190626451135) and Tiara Padayachee (MND190619448759) thank the NRF, South Africa for honours bursaries.

**Acknowledgments:** The authors want to thank Barbara Bradley, Pretoria, South Africa for English language editing.

**Conflicts of Interest:** The authors declare no conflict of interest. The funders had no role in the design of the study, in the collection, analyses, or interpretation of data, in the writing of the manuscript, or in the decision to publish the results.
