Develop 3.1 eqc (#339)

* Add EQC profile

Don't run EQC tests, unless specifically requested e.g. `./rebar3 as eqc eunit --module=leveled_eqc`

* Remove eqc_cover parse_transform

Causes a compilation issue with the assertException in leveled_runner

* Allow EQC test to compile

EQC only works on OTP 22 for now, but other tests should still work on OTP 22 and OTP 24

* Add more complex statem based eqc test

* Add check for eqc profile

rebar.config

@@ -18,10 +18,12 @@
 
 {profiles,
  [{eqc, [{deps, [meck, fqc]},
-    {erl_opts, [debug_info,  {parse_transform, eqc_cover}]},
-    {extra_src_dirs, ["test"]}]},
-  {test, [
-    {eunit_compile_opts, [{src_dirs, ["src", "test/end_to_end"]}]}
+    {erl_opts, [debug_info,  {d, 'EQC'}]},
+    {extra_src_dirs, ["test/property"]},
+    {shell, [{apps, [lz4]}]},
+    {plugins, [rebar_eqc]}
+   ]},
+  {test, [{extra_src_dirs, ["test/end_to_end", "test/property"]}
    ]}
  ]}.