Add docker containers to test services.

This commit initializes the needed services which are not mocked
so tests can be executed in any environment with docker.

Some default modifications (i.e: connection strings) were also made to
current tests to accomodate them for this setup.

A docker-compose.yml file is provided with all the necessary parameters
for this services to be initialized. Future services can be added
easily by extending this configuration file

In addition a makefile has been introduced to simplify command execution

plugins/redis/redis_test.go

@@ -83,7 +83,7 @@ func TestRedisGeneratesMetrics(t *testing.T) {
 	}
 
 	for _, c := range checkInt {
-		assert.NoError(t, acc.ValidateValue(c.name, c.value))
+		assert.True(t, acc.CheckValue(c.name, c.value))
 	}
 
 	checkFloat := []struct {
@@ -98,7 +98,7 @@ func TestRedisGeneratesMetrics(t *testing.T) {
 	}
 
 	for _, c := range checkFloat {
-		assert.NoError(t, acc.ValidateValue(c.name, c.value))
+		assert.True(t, acc.CheckValue(c.name, c.value))
 	}
 }
 
@@ -174,7 +174,7 @@ func TestRedisCanPullStatsFromMultipleServers(t *testing.T) {
 	}
 
 	for _, c := range checkInt {
-		assert.NoError(t, acc.ValidateValue(c.name, c.value))
+		assert.True(t, acc.CheckValue(c.name, c.value))
 	}
 
 	checkFloat := []struct {
@@ -189,7 +189,7 @@ func TestRedisCanPullStatsFromMultipleServers(t *testing.T) {
 	}
 
 	for _, c := range checkFloat {
-		assert.NoError(t, acc.ValidateValue(c.name, c.value))
+		assert.True(t, acc.CheckValue(c.name, c.value))
 	}
 }