Fix broken (false positive) test for pre/post hooks.

Author: marc0der

src/test/cucumber/pre_and_post_installation_hooks.feature

@@ -1,32 +1,37 @@
 Feature: Hooks
 
+	We can safely remove this feature when `.tar.gz` and `.zip` are supported directly by the backend.
+	
 	Background:
 		Given the internet is reachable
 		And an initialised environment
 
 	Scenario: Pre- and Post-installation Hooks return successfully
 		And a machine with "Linux" installed
 		And the system is bootstrapped
-		And the candidate "java" version "8u92" is available for download on "Linux"
-		And a "pre" install hook is served for "java" "8u92" on "Linux" that returns successfully
-		And a "post" install hook is served for "java" "8u92" on "Linux" that returns successfully
-		When I enter "sdk install java 8u92"
+		And the candidate "grails" version "2.1.0" is available for download on "Linux"
+		And a "pre" install hook is served for "grails" "2.1.0" on "Linux" that returns successfully
+		And a "post" install hook is served for "grails" "2.1.0" on "Linux" that returns successfully
+		When I enter "sdk install grails 2.1.0"
 		Then I see "Pre-installation hook success"
 		And I see "Post-installation hook success"
+		And the exit code is 0
 
 	Scenario: Pre-installation Hook returns a non-zero code
 		And a machine with "Linux" installed
 		And the system is bootstrapped
-		And the candidate "java" version "8u92" is available for download on "Linux"
-		And a "pre" install hook is served for "java" "8u92" on "Linux" that returns a failure
-		When I enter "sdk install java 8u92"
+		And the candidate "grails" version "2.1.0" is available for download on "Linux"
+		And a "pre" install hook is served for "grails" "2.1.0" on "Linux" that returns a failure
+		When I enter "sdk install grails 2.1.0"
 		Then I see "Pre-installation hook failure"
+		And the exit code is 1
 
 	Scenario: Post-install Hook returns a non-zero code
 		And a machine with "Linux" installed
 		And the system is bootstrapped
-		And the candidate "java" version "8u92" is available for download on "Linux"
-		And a "pre" install hook is served for "java" "8u92" on "Linux" that returns successfully
-		And a "post" install hook is served for "java" "8u92" on "Linux" that returns a failure
-		When I enter "sdk install java 8u92"
+		And the candidate "grails" version "2.1.0" is available for download on "Linux"
+		And a "pre" install hook is served for "grails" "2.1.0" on "Linux" that returns successfully
+		And a "post" install hook is served for "grails" "2.1.0" on "Linux" that returns a failure
+		When I enter "sdk install grails 2.1.0"
 		Then I see "Post-installation hook failure"
+		And the exit code is 1