Update README and Makefile for aggregator stress test

Author: jpraynaud

mithril-test-lab/mithril-end-to-end/.gitignore

@@ -1,4 +1,5 @@
 data/
 target/
 mithril-end-to-end
+load-aggregator
 .DS_Store

mithril-test-lab/mithril-end-to-end/Makefile

@@ -12,6 +12,7 @@ all: test build
 build:
 	${CARGO} build --release
 	cp ../../target/release/mithril-end-to-end .
+	cp ../../target/release/load-aggregator .
 
 test:
 	${CARGO} test

mithril-test-lab/mithril-end-to-end/README.md

@@ -33,3 +33,16 @@ make build
 # Run
 ./mithril-end-to-end --db-directory db/ --bin-directory ../../target/release
 ```
+
+## build and run the stress tester
+
+```bash
+# Build
+make build
+
+# Help
+./load-aggregator --help
+
+# Run with 100 signers
+./load-aggregator -vvv --cardano-cli-path script/mock-cardano-cli --aggregator-dir ../../target/release --num-signers=100
+```