Disable varDump postgresqlDataDir command as it was not found

While running the script command varDump postgresqlDataDir; was executed, but it was no longer found. It is not needed for the script to work
Tests for libecpg were commented, so our changes from the documentation are visible

Sanity/libecpg/runtest.sh

@@ -47,7 +47,7 @@ rlJournalStart
     rlPhaseEnd
 
     rlPhaseStartSetup "Database setup"
-        varDump postgresqlDataDir;
+        # varDump postgresqlDataDir;
         [[ -d $postgresqlDataDir ]] && rlFileBackup $postgresqlDataDir;
         postgresqlCleanup;
         postgresqlInitDB;

Sanity/libecpg/testecpg-decimal.pgc

@@ -1,4 +1,4 @@
-// Taken from https://www.postgresql.org/docs/13/ecpg-variables.html
+// Taken from https://www.postgresql.org/docs/14/ecpg-variables.html
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -15,7 +15,9 @@ EXEC SQL BEGIN DECLARE SECTION;
     decimal *dec;
 EXEC SQL END DECLARE SECTION;
 
+// Add "USER postgres;"
     EXEC SQL CONNECT TO testdb USER postgres;
+//  EXEC SQL SELECT pg_catalog.set_config('search_path', '', false); EXEC SQL COMMIT;
 
     num = PGTYPESnumeric_new();
     dec = PGTYPESdecimal_new();

Sanity/libecpg/testecpg-interval.pgc

@@ -1,4 +1,4 @@
-// Taken from https://www.postgresql.org/docs/13/ecpg-variables.html
+// Taken from https://www.postgresql.org/docs/14/ecpg-variables.html
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -11,7 +11,9 @@ EXEC SQL BEGIN DECLARE SECTION;
     interval *in;
 EXEC SQL END DECLARE SECTION;
 
+// Add "USER postgres;"
     EXEC SQL CONNECT TO testdb USER postgres;
+//  EXEC SQL SELECT pg_catalog.set_config('search_path', '', false); EXEC SQL COMMIT;
 
     in = PGTYPESinterval_new();
     EXEC SQL SELECT '1 min'::interval INTO :in;