##### SUMMARY
Since `add_host` and `group_by` actions only modify the runtime inventory, hosts/groups/vars added by them don't survive a `meta: refresh_inventory` call (since that call completely clears the runtime inventory). 

##### ISSUE TYPE
- Feature Idea

##### COMPONENT NAME
InventoryManager

##### ADDITIONAL INFORMATION
After some internal discussion, the general consensus seemed to be that this behavior is an undesirable default. The `add_host` and `group_by` actions should manage a more persistent state independent of the runtime inventory, then apply their changes to the running inventory. When a `meta: refresh_inventory` occurs, the normal dynamic inventory clear/refresh should happen, then reapply the add_host/group_by state. This should probably be the default behavior, but a config switch or a different `meta` action (or an arg to it) to emulate the current behavior could also be created if necessary.

from random import shuffle
from ansible import constants as C
from ansible.errors import AnsibleError, AnsibleOptionsError, AnsibleParserError
from ansible.inventory.data import InventoryData
from ansible.module_utils.six import string_types
from ansible.module_utils._text import to_bytes, to_text
from ansible.parsing.utils.addresses import parse_address
from ansible.plugins.loader import inventory_loader
from ansible.utils.helpers import deduplicate_list
from ansible.utils.path import unfrackpath
from ansible.utils.display import Display
from ansible.utils.vars import combine_vars
from ansible.vars.plugins import get_vars_from_inventory_sources
display = Display()
IGNORED_ALWAYS = [br"^\.", b"^host_vars$", b"^group_vars$", b"^vars_plugins$"]
IGNORED_PATTERNS = [to_bytes(x) for x in C.INVENTORY_IGNORE_PATTERNS]
IGNORED_EXTS = [b'%s$' % to_bytes(re.escape(x)) for x in C.INVENTORY_IGNORE_EXTS]
IGNORED = re.compile(b'|'.join(IGNORED_ALWAYS + IGNORED_PATTERNS + IGNORED_EXTS))
PATTERN_WITH_SUBSCRIPT = re.compile(
    r'''^
        (.+)                    # A pattern expression ending with...
        \[(?:                   # A [subscript] expression comprising:
            (-?[0-9]+)|         # A single positive or negative number
            ([0-9]+)([:-])      # Or an x:y or x: range.
            ([0-9]*)
        )\]
        $
    ''', re.X
)
def order_patterns(patterns):