Revert "CI: Print only first 1000 lines of diff output."

This reverts commit 40b3b16c. Now that CI is
bumped to concourse 3.9.2, lets see if we can live without this restriction.

concourse/scripts/ic_gpdb.bash

@@ -21,7 +21,7 @@ function gen_env(){
 						DIFF FILE: \${diff_file}
 						----------------------------------------------------------------------
 
-						\$(head -1000 "\${diff_file}")
+						\$(cat "\${diff_file}")
 
 					FEOF
 			fi

concourse/scripts/ic_gpdb_resgroup.bash

@@ -83,7 +83,7 @@ DIFF FILE: \$diff
 ----------------------------------------------------------------------
 
 EOF1
-                head -1000 \$diff
+                cat \$diff
               done
             exit \$errcode
         )

concourse/scripts/ic_gpdb_sles12.bash

@@ -70,7 +70,7 @@ DIFF FILE: \${diff_file}
 ----------------------------------------------------------------------
 
 FEOF
-                head -1000 "\${diff_file}"
+                cat "\${diff_file}"
               done
             exit 1
         }

concourse/scripts/ic_gpdb_ubuntu.bash

@@ -44,7 +44,7 @@ function gen_icw_test_script(){
           ======================================================================
           DIFF FILE: \${diff_file}
           ----------------------------------------------------------------------
-          \$(head -1000 "\${diff_file}")
+          \$(cat "\${diff_file}")
 FEOF
       fi
     done

concourse/scripts/regression_tests_gpcloud.bash

@@ -22,7 +22,7 @@ source gpdemo/gpdemo-env.sh
 cd "\${GPDB_SRC_DIR}/gpAux/extensions/gpcloud/regress"
 make installcheck pgxs_dir=\$INSTALL_DIR/lib/postgresql/pgxs
 
-[ -s regression.diffs ] && head -1000 regression.diffs && exit 1
+[ -s regression.diffs ] && cat regression.diffs && exit 1
 exit 0
 
 EOF

concourse/scripts/regression_tests_gphdfs.bash

@@ -24,7 +24,7 @@ function gen_env(){
 					DIFF FILE: \${diff_file}
 					----------------------------------------------------------------------
 
-					\$(head -1000 "\${diff_file}")
+					\$(cat "\${diff_file}")
 
 				FEOF
 		fi

concourse/scripts/tinc_gpdb.bash

@@ -15,7 +15,7 @@ function gen_env(){
 		echo "=================================================================="
 		echo "The differences that caused some tests to fail can also be viewed in the file saved at \${TINCDIR}/regression.diffs."
 		echo "=================================================================="
-		head -1000 "\${TINCDIR}/regression.diffs"
+		cat "\${TINCDIR}/regression.diffs"
 		exit 1
 		}