[ci] Set EOS instance for eos commands called in grpc_dir_inject.sh

continuousintegration/orchestration/tests/grpc_dir_inject.sh

 #!/bin/sh
 
 # Migration tools parameters
+EOSINSTANCE=ctaeos
+EOS_CMD="/usr/bin/eos root://${EOSINSTANCE}"
 EOS_TEST_DIR_INJECT=/usr/bin/eos-test-dir-inject
 CONFIG_FILE=/etc/cta/castor-migration.conf
 TMPFILE=/tmp/eos-test-inject-sh.$$
@@ -37,9 +39,11 @@ EOS_PREFIX=$(awk '/^eos.prefix[ 	]/ { print $2 }' ${CONFIG_FILE})
 # Ping the gRPC interface
 ${EOS_TEST_DIR_INJECT} ping || error "gRPC ping failed"
 
-# Create the top-level directory. GNU coreutils "mkdir -p" does not return an error if the directory
-# already exists; "eos mkdir -p" does return an error, which we explicitly ignore.
-eos mkdir -p ${EOS_PREFIX} 2>/dev/null
+# Create the top-level directory.
+#
+# Note: GNU coreutils "mkdir -p" does not return an error if the directory already exists;
+#       but "eos mkdir -p" does return an error.
+${EOS_CMD} mkdir -p ${EOS_PREFIX}
 
 # Create directory with system-assigned file id -- should succeed
 echoc $LT_BLUE "Creating directory with auto-assigned file id"
@@ -47,9 +51,10 @@ ${EOS_TEST_DIR_INJECT} --path ${CASTOR_PREFIX}/my_test_dir >${TMPFILE}
 [ $? -eq 0 ] || error "Creating directory with auto-assigned file id failed"
 json-pretty-print.sh ${TMPFILE}
 rm ${TMPFILE}
-eos ls -l ${EOS_PREFIX}
-eos fileinfo ${EOS_PREFIX}/my_test_dir
-eos rmdir ${EOS_PREFIX}/my_test_dir
+${EOS_CMD} ls -l ${EOS_PREFIX}
+${EOS_CMD} fileinfo ${EOS_PREFIX}/my_test_dir
+XrdSecPROTOCOL=sss ${EOS_CMD} fileinfo ${EOS_PREFIX}/my_test_dir
+${EOS_CMD} rmdir ${EOS_PREFIX}/my_test_dir
 
 # Create directory with self-assigned file id -- should succeed
 echoc $LT_BLUE "Creating directory with self-assigned file id"
@@ -57,7 +62,7 @@ ${EOS_TEST_DIR_INJECT} --fileid 9876543210 --path ${CASTOR_PREFIX}/my_test_dir >
 [ $? -eq 0 ] || error "Creating directory with self-assigned file id failed"
 json-pretty-print.sh ${TMPFILE}
 rm ${TMPFILE}
-eos fileinfo ${EOS_PREFIX}/my_test_dir
+${EOS_CMD} fileinfo ${EOS_PREFIX}/my_test_dir
 
 # Try again -- should fail
 echoc $LT_GREEN "Creating directory with the same file id (should fail)"
@@ -66,12 +71,12 @@ ${EOS_TEST_DIR_INJECT} --fileid 9876543210 --path ${CASTOR_PREFIX}/my_test_dir2
 
 # Remove and try again -- should succeed after restarting EOS
 echoc $LT_GREEN "Remove the directory and restart EOS to remove the tombstone"
-eos rmdir ${EOS_PREFIX}/my_test_dir
+${EOS_CMD} rmdir ${EOS_PREFIX}/my_test_dir
 echoc $LT_BLUE "Recreate the directory with self-assigned file id (should succeed this time)"
 ${EOS_TEST_DIR_INJECT} --fileid 9876543210 --path ${CASTOR_PREFIX}/my_test_dir >/dev/null
 [ $? -eq 0 ] || error "Creating directory with self-assigned file id failed with error $?"
-eos fileinfo ${EOS_PREFIX}/my_test_dir
+${EOS_CMD} fileinfo ${EOS_PREFIX}/my_test_dir
 
 echoc $LT_GREEN "Cleaning up: removing tombstones and removing injected directories"
-eos rmdir ${EOS_PREFIX}/my_test_dir  2>/dev/null
-eos rmdir ${EOS_PREFIX}/my_test_dir2 2>/dev/null
+${EOS_CMD} rmdir ${EOS_PREFIX}/my_test_dir  2>/dev/null
+${EOS_CMD} rmdir ${EOS_PREFIX}/my_test_dir2 2>/dev/null