Update foreign key json file name to 5.0 (#1605)

* Update foreign key json file name to 5.0

* This was breaking gpcheckcat which assumes the json file corresponds
* to the current greenplum version.
* Update docs for generating json file.

Authors: Chris Hajas and Jamie McAtamney

src/backend/catalog/Makefile

@@ -85,8 +85,8 @@ postgres.shdescription: postgres.bki ;
 postgres_bki_srcs: process_col_defaults.pl $(POSTGRES_BKI_SRCS)
 	cat $(POSTGRES_BKI_SRCS) | $(PERL) process_col_defaults.pl > postgres_bki_srcs
 
-4.3.json: process_foreign_keys.pl $(POSTGRES_BKI_SRCS) $(top_srcdir)/src/include/catalog/catversion.h
-	cat $(POSTGRES_BKI_SRCS) $(top_srcdir)/src/include/catalog/catversion.h | $(PERL) process_foreign_keys.pl > 4.3.json
+5.0.json: process_foreign_keys.pl $(POSTGRES_BKI_SRCS) $(top_srcdir)/src/include/catalog/catversion.h
+	cat $(POSTGRES_BKI_SRCS) $(top_srcdir)/src/include/catalog/catversion.h | $(PERL) process_foreign_keys.pl > 5.0.json
 
 postgres.bki: genbki.sh postgres_bki_srcs $(top_srcdir)/src/include/pg_config_manual.h
 	AWK='$(AWK)' $(SHELL) $< $(pg_includes) --set-version=$(VERSION) -o postgres postgres_bki_srcs

src/include/catalog/README.add_catalog_function

@@ -35,9 +35,9 @@ the following steps are needed.
    gpMgmt/bin/gppylib/data/X.X.json. Otherwise, catversion test would fail.
 
    $ cd src/backend/catalog
-   $ make 4.3.json
+   $ make 5.0.json
 
-   After 4.3.json is generated, move it to gpMgmt/bin/gppylib/data/
+   After 5.0.json is generated, move it to gpMgmt/bin/gppylib/data/
 
 5. Run make distclean, make, gpinitsystem and you should be able to see your
    newly added function in pg_proc.

src/include/catalog/README.modifying_catalogs

@@ -72,8 +72,8 @@ gpMgmt/bin/gppylib/data/<version>.json file. There is a script for that
 in src/backend/catalog:
 
   cd src/backend/catalog
-  make 4.3.json
-  cp 4.3.json ../../../gpMgmt/bin/gppylib/data
+  make 5.0.json
+  cp 5.0.json ../../../gpMgmt/bin/gppylib/data
 
 
 If you add a column to an existing PostgreSQL catalog, you can use