Adding integration test pipeline stages

integration_test

 #!groovy
 
-build '/OpenFPM_devices/master'
+stage ('devices')
+{
+  build '/OpenFPM_devices/master'
+}
+stage ('data')
+{
+  build '/OpenFPM_data/master'
+}
+stage ('vcluster')
+{
+  build '/OpenFPM_vcluster/master'
+}
+stage ('IO')
+{
+  build '/OpenFPM_IO/master'
+}
+stage ('pdata')
+{
+  build '/OpenFPM_pdata/master'
+}