Fixing example test run pipeline

Jenkinsfile_examples_test

@@ -13,7 +13,7 @@ parallel (
 
          stage ('run_example_gin')
          {
-          sh "source $HOME/openfpm_vars && cd example && make"
+          sh "source $HOME/openfpm_vars_master && cd example && make"
          }
        }},
 
@@ -29,7 +29,7 @@ parallel (
 
           stage ('run_example_sb15')
           {
-           sh "source $HOME/openfpm_vars && cd example && make"
+           sh "source $HOME/openfpm_vars_master && cd example && make"
 	  }
          }
          }