Description of problem:
ipa-healthcheck command output is not indented by default. As a result the output cannot be read correctly.

Version-Release number of selected component (if applicable):
ipa-healthcheck-0.2-3.module+el8.1.0+3389+a3c612fa.noarch

How reproducible:
Always

Steps to Reproduce:
1. Setup ipa master using RHEL 8.1 beta repo (in my case ipa-server-4.7.90.pre1-3.module+el8.1.0+3389+a3c612fa.x86_64)
2. Setup ipa-healthcheck on this system (# dnf -y install ipa-healthcheck)
3. Run ipa-healthcheck command
# ipa-healthcheck

Actual results:
ipa-healthcheck command output is not indented by default. As a result the output cannot be read correctly. 

[root@auto-hv-01-guest10 ~]# ipa-healthcheck --output-type json
[{"source": "ipahealthcheck.meta.services", "check": "certmonger", "severity": 0, "uuid": "c849492b-9f26-4683-a74c-aa5011d07143", "when": "20190711091157Z", "duration": "0.013412", "kw": {"status": true}}, {"source": "ipahealthcheck.meta.services", "check": "dirsrv", "severity": 0, "uuid": "55c10acc-e22f-4dbb-b069-64f7fa58fb81", "when": "20190711091157Z", "duration": "0.010942", "kw": {"status": true}}, {"source": "ipahealthcheck.meta.services", "check": "gssproxy", "severity": 0, "uuid": "7f09f059-6c57-4d72-9ef1-95b2744d1cea", "when": "20190711091157Z", "duration": "0.010635", "kw": {"status": true}}, {"source": "ipahealthcheck.meta.services", "check": "httpd", "severity": 0, "uuid": "7c9fcc4c-00fe-4171-b5bd-0b56424cb1d7", "when": "20190711091157Z", "duration": "0.010448", "kw": {"status": true}}, {"source": "ipahealthcheck.meta.services", "check": "krb5kdc", "severity": 0, "uuid": "4be3fe83-2bfd-4a0d-b630-65c7b5d6811f", "when": "20190711091157Z", "duration": "0.010611", "kw": {"status": true}}, {"source": "ipahealthcheck.meta.services", "check": "named", "severity": 0, "uuid": "0268a7fd-f9b8-408d-86fc-f40680ae58c2", "when": "20190711091157Z", "duration": "0.010373", "kw": {"status": true}},

.............. Result Truncated


Expected results:
When ipa-healthcheck command is run by default, it should return the output in correct indentation so that it can be easy to interprete


Additional info:
Using command like #ipa-healthcheck --indent 4, the output was correctly indented.

[root@auto-hv-01-guest10 ~]# ipa-healthcheck --indent 4
[
    {
        "source": "ipahealthcheck.meta.services",
        "check": "certmonger",
        "severity": 0,
        "uuid": "55a8e32a-811c-4b25-bfb8-a8a8cc1b3aee",
        "when": "20190711092027Z",
        "duration": "0.013633",
        "kw": {
            "status": true
        }
    },
    {
        "source": "ipahealthcheck.meta.services",
        "check": "dirsrv",
        "severity": 0,
        "uuid": "2e91ba0c-109c-4753-8491-c488c665a647",
        "when": "20190711092027Z",
        "duration": "0.010911",
        "kw": {
            "status": true
        }
    },
.............. Result Truncated