(build) used symantic names for test and coverage commands

* like mysql, mariadb => test-mysql, test-mariadb
* all => test-all
* coverages test ,  mysql-cover => cover-mysql , cover-all
* Fixed issue with coverage merge

package.json

@@ -88,7 +88,7 @@
   "main": "index",
   "scripts": {
     "test": "if [ $COVERAGE ]; then npm run codeclimate; else npm run jshint && npm run teaser && npm run test-unit && npm run test-integration; fi",
-    "test-docker": "docker-compose run sequelize /bin/sh -c \"npm run all\"",
+    "test-docker": "docker-compose run sequelize /bin/sh -c \"npm run test-all\"",
     "test-docker-unit": "docker-compose run sequelize /bin/sh -c \"npm run test-unit-all\"",
     "build-docker": "docker-compose build",
     "docs": "node docs/docs-generator.js",
@@ -110,26 +110,26 @@
     "test-integration-sqlite":"DIALECT=sqlite npm run test-integration",
     "test-integration-mssql":"DIALECT=mssql npm run test-integration",
     "test-integration-all":"npm run test-integration-mysql && npm run test-integration-postgres && npm run test-integration-postgres-native && npm run test-integration-mssql && npm run test-integration-sqlite && npm run test-integration-mariadb",
+    "test-mysql": "DIALECT=mysql npm test",
+    "test-sqlite": "DIALECT=sqlite npm test",
+    "test-postgres": "DIALECT=postgres npm test",
+    "test-pgsql": "npm run test-postgres",
+    "test-postgres-native": "DIALECT=postgres-native npm test",
+    "test-postgresn": "npm run test-postgres-native",
+    "test-mariadb": "DIALECT=mariadb npm test",
+    "test-mssql": "DIALECT=mssql npm test",
+    "test-all": "npm run test-mysql && npm run test-sqlite && npm run test-postgres && npm run test-postgres-native && npm run test-mariadb && npm run test-mssql",
     "cover": "rm -rf coverage && npm run teaser && COVERAGE=true ./node_modules/.bin/istanbul cover ./node_modules/.bin/_mocha --report lcovonly -- -t 30000 --ui tdd 'test/integration/**/*.test.js'",
-    "mysql-cover": "DIALECT=mysql npm run cover && mv coverage coverage-mysql",
-    "sqlite-cover": "DIALECT=sqlite npm run cover && mv coverage coverage-sqlite",
-    "postgres-cover": "DIALECT=postgres npm run cover && mv coverage coverage-postgres",
-    "postgres-native-cover": "DIALECT=postgres-native npm run cover && mv coverage coverage-postgres-native",
-    "mariadb-cover": "DIALECT=mariadb npm run cover && mv coverage coverage-mariadb",
-    "mssql-cover": "DIALECT=mssql npm run cover && mv coverage coverage-mssql",
-    "merge-coverage": "rm -rf coverage && mkdir coverage && './node_modules/.bin/lcov-result-merger coverage-*/lcov.info' 'coverage/lcov.info'",
+    "cover-mysql": "DIALECT=mysql npm run cover && mv coverage coverage-mysql",
+    "cover-sqlite": "DIALECT=sqlite npm run cover && mv coverage coverage-sqlite",
+    "cover-postgres": "DIALECT=postgres npm run cover && mv coverage coverage-postgres",
+    "cover-postgres-native": "DIALECT=postgres-native npm run cover && mv coverage coverage-postgres-native",
+    "cover-mariadb": "DIALECT=mariadb npm run cover && mv coverage coverage-mariadb",
+    "cover-mssql": "DIALECT=mssql npm run cover && mv coverage coverage-mssql",
+    "cover-all": "npm run cover-mysql && npm run cover-postgres && npm run cover-postgres-native && npm run cover-mssql && npm run cover-sqlite && npm run cover-mariadb && npm run merge-coverage",
+    "merge-coverage": "rm -rf coverage && mkdir coverage && ./node_modules/.bin/lcov-result-merger 'coverage-*/lcov.info' 'coverage/lcov.info'",
     "codeclimate-send": "npm install -g codeclimate-test-reporter && CODECLIMATE_REPO_TOKEN=ce835a510bbf423a5ab5400a9bdcc2ec2d189d840b31657c6ee7cb9916b161d6 codeclimate < coverage/lcov.info",
-    "cover-all": "npm run mysql-cover && npm run postgres-cover && npm run postgres-native-cover && npm run mssql-cover && npm run sqlite-cover && npm run mariadb-cover && npm run merge-coverage",
-    "codeclimate": "npm run cover-all && npm run codeclimate-send",
-    "mysql": "DIALECT=mysql npm test",
-    "sqlite": "DIALECT=sqlite npm test",
-    "postgres": "DIALECT=postgres npm test",
-    "pgsql": "npm run postgres",
-    "postgres-native": "DIALECT=postgres-native npm test",
-    "postgresn": "npm run postgres-native",
-    "mariadb": "DIALECT=mariadb npm test",
-    "mssql": "DIALECT=mssql npm test",
-    "all": "npm run mysql && npm run sqlite && npm run postgres && npm run postgres-native && npm run mariadb && npm run mssql"
+    "codeclimate": "npm run cover-all && npm run codeclimate-send"
   },
   "engines": {
     "node": ">=0.6.21"