better lock management and better ci

.gitlab-ci.yml

@@ -2,8 +2,5 @@ image: java:8-jdk
 before_script:
   - export GRADLE_USER_HOME=`pwd`/.gradle
 
-build:
-  script: "./gradlew clean build"
-
 test:
-  script: "./gradlew test"
+  script: "./buildwrapper.sh"

src/main/java/JobServ/ProcessManager.java

@@ -221,12 +221,18 @@ class ProcessManager {
             JobServServer.logger.write("[!] Couldnt get lock " +
                                        String.valueOf(pid) + ": "+ e.getMessage());
             future.cancel(true);
+
+	    // in case lock was grabbed after exception
+	    this.releaseLock(pid);
             return false;
 
         } catch (ExecutionException e) {
             JobServServer.logger.write("[!] Couldnt get lock " +
                                        String.valueOf(pid) + ": "+ e.getMessage());
             future.cancel(true);
+
+	    // in case lock was grabbed after exception
+	    this.releaseLock(pid);
             return false;
 
         // cancel the attempt to grab the lock