Enable command extensions

We rely on command extensions in our scripts but we do not actually
guarantee that they are enabled (usually they are, by default, but they
can be disabled outside of our control). This commit ensures that they
are enabled.

Relates elastic/x-pack-elasticsearch#2307

Original commit: elastic/x-pack-elasticsearch@a5eec8ca7b

plugin/bin/x-pack/certgen.bat

@@ -5,6 +5,7 @@ rem or more contributor license agreements. Licensed under the Elastic License;
 rem you may not use this file except in compliance with the Elastic License.
 
 setlocal enabledelayedexpansion
+setlocal enableextensions
 
 call "%~dp0..\elasticsearch-env.bat" || exit /b 1
 
@@ -19,3 +20,4 @@ call "%~dp0x-pack-env.bat" || exit /b 1
   %*
 
 endlocal
+endlocal

plugin/bin/x-pack/croneval.bat

@@ -5,6 +5,7 @@ rem or more contributor license agreements. Licensed under the Elastic License;
 rem you may not use this file except in compliance with the Elastic License.
 
 setlocal enabledelayedexpansion
+setlocal enableextensions
 
 call "%~dp0..\elasticsearch-env.bat" || exit /b 1
 
@@ -19,3 +20,4 @@ call "%~dp0x-pack-env.bat" || exit /b 1
   %*
 
 endlocal
+endlocal

plugin/bin/x-pack/extension.bat

@@ -5,6 +5,7 @@ rem or more contributor license agreements. Licensed under the Elastic License;
 rem you may not use this file except in compliance with the Elastic License.
 
 setlocal enabledelayedexpansion
+setlocal enableextensions
 
 call "%~dp0..\elasticsearch-env.bat" || exit /b 1
 
@@ -19,3 +20,4 @@ call "%~dp0x-pack-env.bat" || exit /b 1
   %*
 
 endlocal
+endlocal

plugin/bin/x-pack/migrate.bat

@@ -5,6 +5,7 @@ rem or more contributor license agreements. Licensed under the Elastic License;
 rem you may not use this file except in compliance with the Elastic License.
 
 setlocal enabledelayedexpansion
+setlocal enableextensions
 
 call "%~dp0..\elasticsearch-env.bat" || exit /b 1
 
@@ -19,3 +20,4 @@ call "%~dp0x-pack-env.bat" || exit /b 1
   %*
 
 endlocal
+endlocal

plugin/bin/x-pack/setup-passwords.bat

@@ -5,6 +5,7 @@ rem or more contributor license agreements. Licensed under the Elastic License;
 rem you may not use this file except in compliance with the Elastic License.
 
 setlocal enabledelayedexpansion
+setlocal enableextensions
 
 call "%~dp0..\elasticsearch-env.bat" || exit /b 1
 
@@ -19,3 +20,4 @@ call "%~dp0x-pack-env.bat" || exit /b 1
   %*
 
 endlocal
+endlocal

plugin/bin/x-pack/syskeygen.bat

@@ -5,6 +5,7 @@ rem or more contributor license agreements. Licensed under the Elastic License;
 rem you may not use this file except in compliance with the Elastic License.
 
 setlocal enabledelayedexpansion
+setlocal enableextensions
 
 call "%~dp0..\elasticsearch-env.bat" || exit /b 1
 
@@ -19,3 +20,4 @@ call "%~dp0x-pack-env.bat" || exit /b 1
   %*
 
 endlocal
+endlocal

plugin/bin/x-pack/users.bat

@@ -5,6 +5,7 @@ rem or more contributor license agreements. Licensed under the Elastic License;
 rem you may not use this file except in compliance with the Elastic License.
 
 setlocal enabledelayedexpansion
+setlocal enableextensions
 
 call "%~dp0..\elasticsearch-env.bat" || exit /b 1
 
@@ -19,3 +20,4 @@ call "%~dp0x-pack-env.bat" || exit /b 1
   %*
 
 endlocal
+endlocal