Function logs when scaled to 0 gives warning

Changelog for 0.12.1:

• PR #580 Add mrsimpson to customers file by @mrsimpson
• PR #579 Add pedrosousagrilo to CUSTOMERS file by @pedrosousagrilo
• PR #578 Add brandonkal to CUSTOMERS by @brandonkal
• PR #577 Add zwOvO to CUSTOMERS file by @zwOvO
• PR #576 Function logs when scaled to 0 gives warning by @Waterdrips
• PR #572 Add revolunet to CUSTOMERS file by @revolunet
• PR #568 Update travis badge link from .org to .com by @utsavanand2
• PR #565 Rename tests in buildshiprun by @Waterdrips

Commits
0ee8019 Add jeroenbrons by @alexellis
3e1afaa Sort the list of CUSTOMERS by @alexellis
0a3e480 Add mrsimpson to customers file by @mrsimpson
780d1c8 Add pedrosousagrilo to CUSTOMERS file by @pedrosousagrilo
0fbbea4 Add brandonkal to CUSTOMERS by @brandonkal
e9cf9c0 Add zwOvO to CUSTOMERS file by @zwOvO
d0f749c Function logs when scaled to 0 gives warning by @Waterdrips
3b2fef0 Add revolunet to CUSTOMERS file by @revolunet
54b9ff2 Add preview for KubeCon video, update headings by @alexellis
76bace2 Remove conceptual diagram by @alexellis
217cf84 Update travis badge link from .org to .com by @utsavanand2
04828fb Rename tests in buildshiprun by @Waterdrips
af642cb Rename system-metrics to metrics #551 by @Waterdrips

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