SUM: Use html instead of markdown for course importer

docroot/profiles/lagunita/summer_profile/config/sync/split/summer/migrate_plus.migration.sum_csv_summer_courses.yml

@@ -17,7 +17,6 @@ source:
     type: sum_summer_courses
     basic_html: stanford_html
     minimal_html: stanford_minimal_html
-    markdown: sum_markdown
     image_destination: 'public://media/image/csv/'
     apply_link_title: Apply
     learn_more_link_title: 'Learn More'
@@ -119,7 +118,7 @@ process:
   sum_course_format: course_format
   sum_course_length: course_length
   sum_course_notes/value: course_notes
-  sum_course_notes/format: constants/markdown
+  sum_course_notes/format: constants/basic_html
   sum_course_cross_listing:
     -
       plugin: skip_on_empty
@@ -129,7 +128,7 @@ process:
       plugin: explode
       delimiter: ','
   sum_course_description/value: description
-  sum_course_description/format: constants/markdown
+  sum_course_description/format: constants/basic_html
   sum_course_start_date:
     -
       plugin: skip_on_empty
@@ -184,7 +183,7 @@ process:
       bundle: sum_course_population
       entity_type: taxonomy_term
   sum_course_prerequisites/value: pre_requisites
-  sum_course_prerequisites/format: constants/markdown
+  sum_course_prerequisites/format: constants/basic_html
   sum_course_schedule: schedule
   sum_students_also_studied: students_also_studied
   sum_course_units: units