Added MPI CI tests

.gitlab-ci.yml

 stages:
-  - build_libmesh_stage
-  - configure_giraffe_stage
-  - build_giraffe_stage
-  - run_giraffe_stage
-  - verify_giraffe_stage
+  - build_libmesh
+  - configure_giraffe
+  - build_giraffe
+  - run_giraffe_serial
+  - verify_giraffe_serial
+  - run_giraffe_parallel
+  - verify_giraffe_parallel
 
 before_script:
   - . /opt/moose/environments/moose_profile
 
-build_libmesh:
-  stage: build_libmesh_stage
+build_libmesh_job:
+  stage: build_libmesh
   script:
     - pwd
     - git clone -b master https://github.com/idaholab/moose.git
     - cd moose 
     - scripts/update_and_rebuild_libmesh.sh
 
-configure_giraffe:
-  stage: configure_giraffe_stage
+configure_giraffe_job:
+  stage: configure_giraffe
   dependencies:
-    - build_libmesh
+    - build_libmesh_job
   variables:
     GIT_STRATEGY: none
     MOOSE_DIR: "$CI_PROJECT_DIR/moose"
@@ -29,10 +31,10 @@ configure_giraffe:
     - cd examples/integration_example/
     - ../../configure 
 
-build_giraffe:
-  stage: build_giraffe_stage
+build_giraffe_job:
+  stage: build_giraffe
   dependencies:
-    - configure_giraffe
+    - configure_giraffe_job
   variables:
     GIT_STRATEGY: none
     MOOSE_DIR: "$CI_PROJECT_DIR/moose"
@@ -41,10 +43,10 @@ build_giraffe:
     - cd examples/integration_example/
     - make -j8
 
-run_giraffe:
-  stage: run_giraffe_stage
+run_giraffe_serial_job:
+  stage: run_giraffe_serial
   dependencies:
-    - build_giraffe
+    - build_giraffe_job
   variables:
     GIT_STRATEGY: none
     MOOSE_DIR: "$CI_PROJECT_DIR/moose"
@@ -52,19 +54,52 @@ run_giraffe:
   script:
     - set -o pipefail
     - cd examples/integration_example
-    - ../../giraffe-opt -i coefficient_integration.i | tee integration_example.stdout
+    - ../../giraffe-opt -i coefficient_integration.i | tee integration_example_serial.stdout
     - exit $?
 
-verify_giraffe:
-  stage: verify_giraffe_stage
+verify_giraffe_serial_job:
+  stage: verify_giraffe_serial
   dependencies:
-    - run_giraffe
+    - run_giraffe_serial_job
   variables:
     GIT_STRATEGY: none
   script: 
     - cd examples/integration_example
-    - v1=$(grep "Heat balance" integration_example.stdout | tail -1 | tr -s ' ' | cut -d ' ' -f 5)
-    - v2=$(grep "Heat balance" integration_example.stdout | tail -1 | tr -s ' ' | cut -d ' ' -f 6)
+    - grep -n "Heat balance" integration_example_serial.stdout
+    - v1=$(grep "Heat balance" integration_example_serial.stdout | tail -1 | tr -s ' ' | cut -d ' ' -f 5)
+    - v2=$(grep "Heat balance" integration_example_serial.stdout | tail -1 | tr -s ' ' | cut -d ' ' -f 6)
+    # We want to test this statement:
+    #   (0.78529 < $v1 < 0.78549) && (0.78203 < $v2 < 0.78203)
+    # However, bc will return 1 if true, and we want the script to return 0 if successful
+    # Hence, we test the inverse of that statement.  The inverse statement will
+    # return 0 if the *desired* condition is true.  
+    - echo "$v1 < 0.78529825617157133 || $v1 > 0.78549825617157133 || $v2 < 0.78203376069904283 || $v2 > 0.78223376069904283" | bc
+
+run_giraffe_parallel_job:
+  stage: run_giraffe_parallel
+  dependencies:
+    - build_giraffe_job
+  variables:
+    GIT_STRATEGY: none
+    MOOSE_DIR: "$CI_PROJECT_DIR/moose"
+    LIBMESH_DIR: "$CI_PROJECT_DIR/moose/libmesh/installed" 
+  script:
+    - set -o pipefail
+    - cd examples/integration_example
+    - mpirun -np 4 ../../giraffe-opt -i coefficient_integration.i | tee integration_example_parallel.stdout
+    - exit $?
+
+verify_giraffe_parallel_job:
+  stage: verify_giraffe_parallel
+  dependencies:
+    - run_giraffe_parallel_job
+  variables:
+    GIT_STRATEGY: none
+  script: 
+    - cd examples/integration_example
+    - grep -n "Heat balance" integration_example_parallel.stdout
+    - v1=$(grep "Heat balance" integration_example_parallel.stdout | tail -1 | tr -s ' ' | cut -d ' ' -f 5)
+    - v2=$(grep "Heat balance" integration_example_parallel.stdout | tail -1 | tr -s ' ' | cut -d ' ' -f 6)
     # We want to test this statement:
     #   (0.78529 < $v1 < 0.78549) && (0.78203 < $v2 < 0.78203)
     # However, bc will return 1 if true, and we want the script to return 0 if successful