Add appName when report jvm metrics to prometheus

[khotyn]

Currently app name tag is not set then report jvm metrics to prometheus, which should have.

[joker0035]

原来的上报的metric 格式为
jvm_heap_memory_used{instance="$instance", job="$job"}

希望可以变成
jvm_heap_memory_used{instance="$instance", job="$job",app="$app"}

app为spring boot应用的名字，如果程序中没有该项配置，可以只带上instance和job。

[joker0035]

spring boot应用的应用名通常定义在 application.properties中，
spring.application.name=“xxxxx”

[khotyn]

@joker0035 Just release a new SNAPSHOT verison of SOFALookout to fix this problem, you can add the follow dependencies to your project to have a try:

  <dependency>
    <groupId>com.alipay.sofa.lookout</groupId>
    <artifactId>lookout-sofa-boot-starter</artifactId>
    <version>1.5.2-SNAPSHOT</version>
</dependency>
    <dependency>
    <groupId>com.alipay.sofa.lookout</groupId>
    <artifactId>lookout-api</artifactId>
    <version>1.5.2-SNAPSHOT</version>
</dependency>
<dependency>
    <groupId>com.alipay.sofa.lookout</groupId>
    <artifactId>lookout-client</artifactId>
    <version>1.5.2-SNAPSHOT</version>
</dependency>
<dependency>
    <groupId>com.alipay.sofa.lookout</groupId>
    <artifactId>lookout-common</artifactId>
    <version>1.5.2-SNAPSHOT</version>
</dependency>
<dependency>
    <groupId>com.alipay.sofa.lookout</groupId>
    <artifactId>lookout-core</artifactId>
    <version>1.5.2-SNAPSHOT</version>
</dependency>
<dependency>
    <groupId>com.alipay.sofa.lookout</groupId>
    <artifactId>lookout-ext-jvm</artifactId>
    <version>1.5.2-SNAPSHOT</version>
</dependency>
<dependency>
    <groupId>com.alipay.sofa.lookout</groupId>
    <artifactId>lookout-ext-os</artifactId>
    <version>1.5.2-SNAPSHOT</version>
</dependency>
<dependency>
    <groupId>com.alipay.sofa.lookout</groupId>
    <artifactId>lookout-reg-prometheus</artifactId>
    <version>1.5.2-SNAPSHOT</version>
</dependency>
<dependency>
    <groupId>com.alipay.sofa.lookout</groupId>
    <artifactId>lookout-reg-server</artifactId>
    <version>1.5.2-SNAPSHOT</version>
</dependency>

Please reopen the issue if you have any further questions.